Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
hoc hieu » hoc thieu, hoc hien, hoc dieu
doc hieu » toc thieu, hoc thieu, hoc hien
dung cua » dung luan, dung cho
cua dong » chua dong, cua cong, cua dang
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hieu) OR (doc hieu)) manh - thanh dung cua dong ((cong tan) or (cong san)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (doc hieu)) manh - thanh dung cua dong ((cong tan) OR (cong san)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (doc hieu)) manh - thanh dung cua dong ((cong tan) or (cong san)) than cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) OR (doc hieu)) manh - thanh dung cua dong ((cong tan) or (cong san)) than cau*.