Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
hieu tinh » chieu tinh, lieu tinh, kieu tinh
dung cong » dung trong
cong cong » cong dong, trong cong, dang cong
luong bac » luong cac, phuong bac, luong tai
doc hieu » toc thieu, hoc thieu, hoc hien
luong va » dung va
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu tinh - thanh dung cong cong ((luong bac) or (luong va)) than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu tinh - thanh dung cong cong ((luong bac) OR (luong va)) than cap.
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - thanh dung cong cong ((luong bac) or (luong va)) than cap*.