Perhaps you should try some spelling variations:
thanh tung » thanh cong
xuat thong » xuat thuong, suat thong, luat thuong
hieu lang » chieu sang, hieu quang, nhieu tang
tung xuat » ung suat, dung xuan, tu xuat
cong sang » cong san, cong vang, cong bang
cong lang » cong vang, cong luong, cong quang
doi hieu » doi chieu, doc hieu, doi hien
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - thanh tung xuat thong ((cong sang) or (cong lang)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh tung xuat thong ((cong sang) OR (cong lang)) than cau.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh tung xuat thong ((cong sang) or (cong lang)) than cau*.