By default IXXO Cart uses the "OR" boolean function in its search. If you want to change it to "AND," you can do so by making the following changes to the engine_functions.php page.

You will need the source code to make these changes.

content/engine/engine_functions.php

line # 511 (or near that)

 function parseSearchKeywords($search_str = '', &$objects) {
define("ADVANCED_SEARCH_DEFAULT_OPERATOR", "or");

replace or with

 function parseSearchKeywords($search_str = '', &$objects) {
define("ADVANCED_SEARCH_DEFAULT_OPERATOR", "and");