Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung qua » trung quan, trong qua, trung cua
qua nhung » quan nhung, cua nhung, qua chung
thanh bac » nhanh bac, thanh san, thanh hai
thanh bai » thanh hai, thanh tai, thanh oai
doc hieu » toc thieu, hoc thieu, hoc hien
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: doc hieu lang - thanh trung qua nhung cong tan ((thanh bac) or (thanh bai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu lang - thanh trung qua nhung cong tan ((thanh bac) OR (thanh bai)).
• Adding a wildcard symbol may retrieve word variants: doc hieu lang - thanh trung qua nhung cong tan ((thanh bac) or (thanh bai))*.