Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung tang » trung thang, trong tang, trung thanh
hoc thieu » toc thieu, hoc hien
tang dung » tang duong, dang dung, tan dung
ho chieu » theo chieu, doi chieu, mot chieu
cong tap » cuong tap, cong tan, tong tap
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap

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

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