Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
tranh ban » trinh ban, tranh hang, tranh luan
chu sach » cau sach, thu sach, chieu sach
rau sach » cau sach, hau sach, khau sach
cong tan » cong tac, cong san, cong thanh
tran ban » tran van, toan ban, tran bai

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu sach) or (rau sach)) - thanh trung cua nhung cong tan ((tran ban) OR (tranh ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu sach) OR (rau sach)) - thanh trung cua nhung cong tan ((tran ban) OR (tranh ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu sach) or (rau sach)) - thanh trung cua nhung cong tan ((tran ban) OR (tranh ban))".
• Adding a wildcard symbol may retrieve word variants: theo ((chu sach) or (rau sach)) - thanh trung cua nhung cong tan ((tran ban) OR (tranh ban))*.