Or can be, if you're content to take whatever you find. But if you want to improve the quality of your simple search results, there are a few things you should keep in mind when constructing your query. Search engines have the capability to deliver tens of thousands of results. At every step along the way, the selection of keywords you choose will be crucial. The more unique the keywords, the better.
Search engines look for matches.
Too many matches, and you will be overwhelmed by results. Keep it in mind when you launch your search. Whatever you're looking for, try to narrow it down to a few keywords that could be expected to figure prominently in the material you're looking for. Many indexing systems work on algorithms whereby the appearance of keywords in documents are rated according to how far they are from the top of the page. The assumption is that descriptive words will be at the top, whether in the form of an intro, an index, or a title.