Google-search – How to one send multiple word OR queries to Google

*EDIT: And looking further, it seems someone else has identified other sources so maybe my hypothesis doesn't hold. That article gives much better insight than I do. (The page is also 4 years old, but the most relevant post I could find.)

Doing a few random searches, it looks like all the answers come from the same sets of sources. My educated guess would be that Google has already determined sources which are trustworthy/reliable and have written algorithms to parse/search these resources and return these results in an order which is consistent with its other search algorithms.

I base this hypothesis on that I haven't seen any sources outside of these specific ones in approx 10 different searches:

• en.wikipedia.org/wiki/
• wordnetweb.princeton.edu/
• en.wiktionary.org/

This page offers some addditional suggestions on how to properly identify definitions in your HTML however the no conclusion was reach on how Google sources these definitions.

Word order does affect your search results. For example, try the following two searches and observe the differences:

wind turbine energy

energy turbine wind

Not only the number of results but also the order of mutual results are different. Note that if you put your search terms in quotation marks, Google looks for the exact sequential words. For example:

"wind turbine energy"

This kind of search will, of course, lead to less number of results.