Perhaps you should try some spelling variations:
thanh tung » thanh cong
nhung cong » thong cong, hang cong, nhung don
tieu sach » chieu sach, dien sach, te sach
dung cong » dung trong
tung cua » trung cua, tuong cua, dung cua
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - thanh tung cua ((nhung cong) or (dung cong)) quang ((than cap) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - thanh tung cua ((nhung cong) OR (dung cong)) quang ((than cap) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - thanh tung cua ((nhung cong) or (dung cong)) quang ((than cap) or (khan cap))*.