Perhaps you should try some spelling variations:
thanh xuong » thanh huong, thanh cuong, thanh duong
hieu lang » chieu sang, hieu quang, nhieu tang
xuong dan » huong dan, xuong san, tuong dan
dung cong » dung trong
doi hieu » doi chieu, doc hieu, doi hien
dan dung » van dung, tin dung, ap dung
cong van » cong vang, cong san, song van
tan cau » toan cau, van cau, tao cau
tan ca » tan cua, tang ca, dan ca

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 xuong dan dung cong van ((tan cau) or (tan ca))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh xuong dan dung cong van ((tan cau) OR (tan ca)).
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh xuong dan dung cong van ((tan cau) or (tan ca))*.