Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh hung, hanh dung
thanh tung » thanh cong
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap

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) or (ho chieu)) tinh - ((thanh dung) OR (thanh tung)) cua dung cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (ho chieu)) tinh - ((thanh dung) OR (thanh tung)) cua dung cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (ho chieu)) tinh - ((thanh dung) OR (thanh tung)) cua dung cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (ho chieu)) tinh - ((thanh dung) OR (thanh tung)) cua dung cong san toan cau*.