Perhaps you should try some spelling variations:
hanh thang » nhanh thang, thanh thang, hanh trang
hanh trung » thanh trung, hanh trang, manh trung
hieu lang » chieu sang, hieu quang, nhieu tang
trung cap » truong cao, trung tam
cong cong » cong dong, trong cong, dang cong
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
ban hanh » ban hang

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