i am using the function web_find_text to find the unique text from the page and according to it, the result should be displayed

the problem which i am facing is some times it's taking too much time to find the text from the page and on checking in Task manager ,it's shown as explorer is not responding.

Those pages which contains a combo box and it's having large values is usally taking too much time and the above said problem is coming

Any suggestion will be geratly Appreciated