Kendala pada Filter AngularJS

Saya baru belajar menggunakan angular js pada video tutorial saya berhasil melakukan penampilan data jika menggunakan data dari html, tapi ketika database saya mengalami kesulitan ketika menuli kode dipencari hasilnya tidak muncul. Mohon bimbinganya kang.


	<?php
		require_once '../core/init.php';
		require_once '../view/header.php';
		require_once '../view/navadmin.php';

		$datatanah = tampilkan();

		if (isset($_GET['cari'])) {
			$cari      = $_GET['cari'];
			$datatanah = hasil_cari($cari);
			}
	?>
	<section class="container-fluid sectionadmin">
        <div class="row">
		    <a href="adddata.php" class="btn btn-success glyphicon glyphicon-plus navbar-right"; style="margin-right: 5px; margin-top: -10px;"> AddData</a>
	  	    <table  border = "1" id="tabledatatanah">
              	<thead>
              		<tr>
              		<th colspan="17">
	              		<form action="" method="get" >Pencarian :
								<input type="search" name="cari" placeholder="Masukan Kode Kohir" class="form-control1" ng-model="hasil">
						</form>
					</th>
                	<tr>
                		<th colspan="4"> Asal Tanah </th>
		                <th>Peralihan 1</th>
		                <th>Peralihan 2</th>
		                <th>Peralihan 3</th>
		                <th>Peralihan 4</th>
		                <th>Peralihan 5</th>
		                <th>Peralihan 6</th>
	                  	<th rowspan="2">AKSI</th>
	                	<tr>
		                  	<th>Kohir</th>
		                  	<th>Persit</th>
		                  	<th>Nama</th>
		                  	<th>Luas</th>
                  			<th>No. Akta Jual</th>
                  			<th>No. Akta Jual</th>
                  			<th>No. Akta Jual</th>
                  			<th>No. Akta Jual</th>
                  			<th>No. Akta Jual</th>
                  			<th>No. Akta Jual</th>
		                </tr>
                	</tr>
                </tr>
                </thead>
                <tbody>
              		<?php while ($row = mysqli_fetch_assoc($datatanah)): ?>
              		<div ng-init="data = [$datatanah]">
                    <tr ng-repeat = "dn in data | filter:hasil | orderBy:'kohirat'">
                      <td><?= $row['kohirat'];?></td>
                      <td><?= $row['persitat'];?></td>
                      <td><?= $row['namaat'];?></td>
                      <td><?= $row['luasat'];?></td>
                      <td><?= $row['nomorajph1'];?></td>
                      <td><?= $row['nomorajph2'];?></td>
                      <td><?= $row['nomorajph3'];?></td>
                      <td><?= $row['nomorajph4'];?></td>
                      <td><?= $row['nomorajph5'];?></td>
                      <td><?= $row['nomorajph6'];?></td>
                      <td>
                      	<a href ="#" class="glyphicon glyphicon-edit"></a> |
                        <a href="deletedata.php?id=<?= $row['id'];?>" onclick="return confirm('Anda yakin ingin keluar dari menu ini..?')" class="glyphicon glyphicon-trash"></a> |
                        <a href ="viewdata.php?id=<?= $row['id']; ?>" target='_blank'><span class="glyphicon glyphicon-eye-open";"></span></a>
                      </td>
                    </tr>
                    </div>
                </tbody>
				  <?php endwhile; ?>
	        </table>
      </div><br>
      <div align="center">
	      <a href="#" class="btn btn-primary glyphicon glyphicon-print";> Print</a>
	      <a href="#" id="ekspor" onClick="javascript:fnExcelReport();"  class="btn btn-success glyphicon glyphicon-random";> EksportToExcel</a>
	      </section><br>
      </div>
	<?php require_once '../view/footer.php' ?>