How can I get better search results?

<p><span class="classifiedheader">If you don't have many results, try:</span></p>
<p><b>granada OR scorpio</b>
<br>adverts that contain either the word "granada", or the word "scorpio"</p>
<p><b>xr*</b>
<br>adverts containing any word starting with "xr", including xr2, xr3 and xr3i</p>
<p><span class="classifiedheader">If you have too many results, try:</span></p>
<p><b>ford AND escort</b>
<br>adverts that contain the word "ford", and the word "escort"</p>
<p><b>escort NOT ford </b>
<br>adverts containing "escort" but exclude those mentioning "ford"</p>
<p><span class="classifiedheader">If you want to narrow down the search to adverts in your region, try:</span></p>
<p><b>ford AND escort AND essex</b>
<br>find cars in the county of Essex</p>
<p><b>ford AND escort AND SS7</b>
<br>find cars in the postcode region SS7</p>
<p><b>ford AND escort AND SS*</b>
<br>find cars in the postcode region, including for example SS7 and SS12</p>