They stem words aggressively, so searching for "repeater", which is a less common, specific term, gives you results including "repeat", a commonly used word.
And there's no way to do an exact word search.
FYI, specifying the nfpr=1 query string parameter will disable Google's idiot attempt to try be helpful by searching for something other than that which you want to link to.
when I click this google gives me results for “how to use openlm” a commercial product, they literally change your search term if there’s a product that fits
They stem words aggressively, so searching for "repeater", which is a less common, specific term, gives you results including "repeat", a commonly used word. And there's no way to do an exact word search.