Stopwords are words which, because of their frequent use in the database, are not searchable.
a [the letter "a" is searchable only in the title field] about after again all almost also although always among an and another any approximately are as at be because been before being between both but by can could did do does done due during each either enough especially etc followed following for found from further give given giving had hardly has have having here how however if in into is it its itself just kg km largely like made mainly make may might min ml mm more most mostly must nearly neither no nor not now obtain obtained of often on only or other our out over overall per perhaps possible previously quite rather really regarding resulted resulting same seem seen several should show showed shown shows significant significantly since so some such suggest than that the their theirs them then there these they this those through thus to under up upon use used using various very was we were what when whereas which while with within without would