Perhaps you should try some spelling variations:
thanh trung » thanh tung
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
thanh cha » thanh ha, thanh nha, thanh phan
toc hieu » toc thieu, doc hieu, hoc thieu
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu lang - thanh trung cua thong cong tan ((((than cau) or (thanh cha))) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu lang - thanh trung cua thong cong tan ((((than cau) OR (thanh cha))) OR (than cap))*.