Windows 10 How can I get search to prioritise documents?

[spaghetti]

I have a pdf in my documents that I access regularly called:
"CMF_book_en-gb.pdf"

I usually use the Windows search to open anything (docs, files, programmes etc) so it's a little frustrating having the search for 'CMF' bring up 'CMD' as the first result. I get that it thinks I've spelt CMD incorrectly - but I clearly haven't.

Is there any way to train this out?

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[Neemobeer]

In the search bar type document: <search term> and Windows search will only look for documents