How do various factors influence the results that different search engines produce?

Each search engine uses a different, proprietary, formula to rank results to give for keywords searched.

Google's formula is set to have at least 1,000 parameters that score basically each page found by its robots (spiders)... then put into a huge database.  That data collection is then searched with parameters relative to the searchers (like past searches, location and so on) in order to provide a custom search result.

You and me could be sitting next to each other,doing the same exact search on the same search engine and not receive the same list of results, at least not in the same order.

solution:

the auto-correct option of the auto-correct tool enables you to add and delete words that do not follow abbreviation rules because:

it is a feature that allows outlook to correct common spelling and typing errors and to replace characters with symbols. we can also can use auto-correct as a shortcut, which means we can type a small string of characters and have those characters replaced by a longer string.