Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu sach » chieu sach, hieu cach, dien sach
tung tuan » trung tuan, quang tuan, trang tuan
hung tuan » hung tran, quang tuan, trung tuan
doc hieu » toc thieu, hoc thieu, hoc hien
cong tac » cong ty
tac chan » tac chuan, tac can, tac chon
chan cau » phan cau, can cau, chinh cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu sach - thanh ((tung tuan) or (hung tuan)) nhung cong tac chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - thanh ((tung tuan) OR (hung tuan)) nhung cong tac chan cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - thanh ((tung tuan) or (hung tuan)) nhung cong tac chan cau*.