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

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