Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
luan chung » luan chinh
hieu lang » chieu sang, hieu quang, nhieu tang
qua nhung » quan nhung, cua nhung, qua chung
doi hieu » doi chieu, doc hieu, doi hien
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
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 thong ((qua nhung) or (luan chung)) cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh thong ((qua nhung) OR (luan chung)) cong tan than cau.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh thong ((qua nhung) or (luan chung)) cong tan than cau*.