Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong thanh » dong thanh, cong trinh, cong tan
hieu lang » chieu sang, hieu quang, nhieu tang
trung vat » trung va, trung van, trong vat
cong manh » cong danh, duong manh, hoang manh
hoi hieu » hoi phieu, hoi tieu, moi hieu
vat dung » van dung, va dung, viet dung
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - thanh trung vat dung ((cong manh) or (cong thanh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - thanh trung vat dung ((cong manh) OR (cong thanh)) toan tap.
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - thanh trung vat dung ((cong manh) or (cong thanh)) toan tap*.