Uh, you can choose "match all" or "match any" in the search form. "Match all" is for very specific searches, "match any" is for less-specific ones. Of course, either is OK if you just use one search term like "overheating" which is a better choice. Now, if you wanted to search for how to do something about overheating, you might try "overheating fix" and select "match all" vs. "match any" because "match any" will also pull up threads about fixing anything else too.
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