Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh han
hieu lang » chieu sang, hieu quang, nhieu tang
cong cong » cong dong, trong cong, dung cong
nho hieu » nha hieu, nho sieu, nhu hieu
tinh cua » trinh cua, sinh cua, tinh chat
van toan » van tuan, van tan, van thanh
ban than » ban thanh, van thanh, 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: nho hieu lang - hanh ((trinh luan) or (tinh cua)) cong cong ((van toan) or (ban than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho hieu lang - hanh ((trinh luan) OR (tinh cua)) cong cong ((van toan) OR (ban than)) ban.
• Adding a wildcard symbol may retrieve word variants: nho hieu lang - hanh ((trinh luan) or (tinh cua)) cong cong ((van toan) or (ban than)) ban*.