Perhaps you should try some spelling variations:
toan thanh » tran thanh, hoan thanh, toan thang
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » chieu sang, hieu quang, nhieu tang
cong toan » cong tan, cong hoan, cong tuan
thanh cha » thanh ha, thanh nha, thanh phan
doc hieu » toc thieu, hoc thieu, hoc hien

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