You can filter your listings using many variables, one being the title of the listing.
The first variable that is required is wherefield=shorttitle. This needs to be in the URL in order for the filter to be activated.
The additional variables you can use for this type of filter are described below.
wherecriteria - This variable would contain the text you wish to filter. For example, if you wanted to show all listings with the words "Repo" in the title, you would do the following:
IMPORTANT: This is a wild card filter, so using only one word is not recommended. For example, if you want to filter the word 'repo', all listings containing the letters 'repo' in the title would be filtered... such as 'reposition', 'grepo lakes', etc. It is best to use something that is more unique, such as two words, like 'bank repo' or '*repo*'. You will usually want to edit your listing titles to ensure they work best with your filter.
wheretype - For this variable you can specify 'not'. This would bring up all listings where the word was NOT in the title. So for example, you want to bring up all properties that do NOT contain the word 'test' in the title. The following link would display all listings which did not contain the word test.