Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
manh hung » anh huong
dung cong » dung trong
cong dang » cong dong, cong dan, cong dung
dang hanh » dang thanh, ban hanh, dang van
doc hieu » toc thieu, hoc thieu, hoc hien
cua dung » cua dang, cua dong, qua dung
hanh cay » nhanh cay, hanh cac, hanh cat

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 - ((sinh trung) or (manh hung)) cua dung cong dang hanh cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu lang - ((sinh trung) OR (manh hung)) cua dung cong dang hanh cay.
• Adding a wildcard symbol may retrieve word variants: doc hieu lang - ((sinh trung) or (manh hung)) cua dung cong dang hanh cay*.