I'm really sure [but if you want to emphasise how certain you are, then you could say "absolutely sure"] that there're there are records which match the conditions. Is there any syntax problem other than that? We should have ["need" might be better than "should have"] very clear, accurate formulae [delete comma] and definitions [delete comma] in order to finishing finish both!
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.