Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu lang » chieu sang, hieu quang, nhieu tang
trung vai » trung dai, trung va, trung van
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
hoi hieu » hoi phieu, hoi tieu, moi hieu
vai dung » van dung, mai dung, va dung
toan cau » toan cao, toan tap, toan tai
toan ban » van 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 vai dung cong manh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - thanh trung vai dung cong manh ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - thanh trung vai dung cong manh ((toan cau) or (toan ban))*.