for all

Từ điển Oxford Advanced Learner 8th

for ˈall idiom
1. despite
•For all its clarity of style, the book is not easy reading.
2. used to say that sth is not important or of no interest or value to you/sb
•For all I know she's still living in Boston.
•You can do what you like, for all I care.
•For all the good it's done we might as well not have bothered.
Main entry: ↑for_idiom