I love the label appearance as “modern”, change filename’s color when you label it, but for some file, it doesn’t wok, can any one help me?
Welcome @Erica-von-Hutten
How are you changing the labels?
By clicking the label icon in the top toolbar… 
As these are search results, does the title contain any occurrences of the search term?
OH yes that’s why !! Thanks !! 