AJAX Search
The text length of the results summary is taken from the main search component. You can change it in your language localise file, e.g. language/en-GB/en-GB.localise.php in getSearchDisplayedCharactersNumber() function. Here you can also change minimum number of characters to be entered before performing a search - under getLowerLimitSearchWord() function. Note that this will change settings for the main search component as well. You will be able to change these setting independently in PRO version of AJAX Search due soon.