Perhaps you should try some spelling variations:
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
cua nhung » va nhung
cong cua » cong cu, dong cua, huong cua
cong tac » cong ty
than tap » toan tap, phan tap, than cap
han tap » han tai, toan tap, nhan tai

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 - thanh cong cua nhung ((cong san) or (cong tac)) ((than tap) or (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - thanh cong cua nhung ((cong san) OR (cong tac)) ((than tap) OR (han tap)).
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - thanh cong cua nhung ((cong san) or (cong tac)) ((than tap) or (han tap))*.