Perhaps you should try some spelling variations:
thanh chuong » thanh huong, thanh cong, nhanh chong
chuong qua » chuong chua, duong qua, thong qua
hieu lang » chieu sang, hieu quang, nhieu tang
qua nhung » quan nhung, cua nhung, qua chung
cong tang » cong thang, cong lang, cong vang
hoc hieu » hoc thieu, hoc hien, doc hieu
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - thanh chuong qua nhung ((cong tan) or (cong tang)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - thanh chuong qua nhung ((cong tan) OR (cong tang)) van ban*.