This is the 107th most frequent Bulgarian word.
някои
"Някои" means "some" or "certain" in English.
In this sentence, 'някои' is used as an indefinite pronoun to refer to unspecified items within a category, 'some books.'
Търся някои книги, които биха били полезни за проекта ми.
I am looking for some books that would be useful for my project.
Here, 'някои' indicates a selection and implies a part of the whole, 'some of the fruits'.
Моля те, избери някои от плодовете в купата, за да направя салата.
Please, choose some of the fruits from the bowl so I can make a salad.
The word 'някои' here is used to specify an indefinite part of a larger group, translated as 'some.'