This user may be away or inactive for varying periods of time, especially if he has exams.
Although he may occasionally be able to do some editing, talk page messages might not receive a timely response.
There is a full-featured advanced search engine at Lycos UK. It is more powerful than Wikipedia's search box, and you can limit searches to a specific URL, such as the Wikipedia website. Here's how. Click on the provided link above, and then enter your search term. Then scroll down to the domain section and add "wikipedia.org" in the box provided. Then click "Go".