Many search engines have carved out a niche market for themselves. For example, Anzwers specializes on Australian and New Zealand Web sites. Deja is famous for its ability to search newsgroups. To make informed decisions one must gain knowledge. Knowledge is derived from information.
Information is structured raw data which can be easily retrieved thanks to the Internet.
The Internet is full of information. To search the Web effectively one should begin with the end in mind. Start by formulating a query. Try the obvious domain names. If you get stuck, use another search engine.