Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
huong cua » dung cua
dong cong » duong cong, dung cong, dang cong
cong tac » cong ty
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu
cong cu » chung cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - thanh ((huong cua) or (cong cu)) dong cong tac ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh ((huong cua) OR (cong cu)) dong cong tac ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh ((huong cua) or (cong cu)) dong cong tac ((toan cau) or (toan cao))*.