Perhaps you should try some spelling variations:
thuan dung » thuat dung, tuan dung, thuong dung
hieu lang » chieu sang, hieu quang, nhieu tang
nhan dong » nhanh dong, nhan dang, phan dong
phan hong » phan cong, pham hong, phan song
dung cong » dung trong
cong tac » cong ty
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu

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 - ((nhan dong) or (phan hong)) thuan dung cong tac ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((nhan dong) OR (phan hong)) thuan dung cong tac ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((nhan dong) or (phan hong)) thuan dung cong tac ((toan cau) or (toan ban))*.