Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hanh dung » thanh dung, anh dung, hanh dong
hang cong » dang cong, hang nong, bang cong
chu sach » thu sach, chieu sach, chuc hach
cau sach » cao sach, hau sach, rau sach
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: chao ((chu sach) OR (cau sach)) - hanh dung va ((nhung cong) OR (hang cong)) tac than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "chao ((chu sach) or (cau sach)) - hanh dung va ((nhung cong) OR (hang cong)) tac than cau~".
• Adding a wildcard symbol may retrieve word variants: chao ((chu sach) or (cau sach)) - hanh dung va ((nhung cong) OR (hang cong)) tac than cau*.