Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
nhung cong » dung cong, thong cong, hang cong
trung va » truong va, trang va, trung ha
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran tan » tran tuan, tran van, tran thanh
tung va » tuong va, dung va, vung va

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

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