That is why different search engines require that you enter your queries differently. Some suggest using 'Boolean Operators' to refine your search. Other engines look for words in close 'proximity' to one another. Some will look for 'phrases'. Some engines may offer links to 'similar pages'.
Every engine works differently.
They usually provide tips on refining your search. The 'collect' function roams and wanders millions of sites and creates a database of what you're looking for. Perhaps an analogy would serve well here. Picture a football field, blanketed with pages of documents that are organized in rows and columns. Each page has a title, subtitle and other text.