Perhaps you should try some spelling variations:
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
cach manh » cach mang, cach nhanh, sach danh
gian thua » giai thuat, gian cua, gian ha
manh cua » doanh cua, ban cua
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - cach manh cua dung ((cong tan) or (cong san)) gian thua~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - cach manh cua dung ((cong tan) OR (cong san)) gian thua.
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - cach manh cua dung ((cong tan) or (cong san)) gian thua*.