Perhaps you should try some spelling variations:
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
cong san » cong tac
than cao » thai cao, than cap, than sao
toan cao » toan ban, toan tap

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 - ((thanh trung) or (thanh tung)) va nhung cong san ((than cao) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - ((thanh trung) OR (thanh tung)) va nhung cong san ((than cao) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: theo chu sach - ((thanh trung) or (thanh tung)) va nhung cong san ((than cao) or (toan cao))*.