Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh huong, thanh cuong
chieu tach » chiet tach, chieu sach, chiu trach
thanh tung » thanh cong
trong quan » thong quan, thong quang, luong quan
quan dung » quang dung, quan duong, qua dung
tong quan » thong quan, tong luan, luong quan
ho chieu » theo chieu, hoc thieu, doi chieu
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: ho chieu tach - ((thanh tuong) or (thanh tung)) quan dung ((trong quan) OR (tong quan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tach - ((thanh tuong) OR (thanh tung)) quan dung ((trong quan) OR (tong quan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu tach - ((thanh tuong) or (thanh tung)) quan dung ((trong quan) OR (tong quan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu tach - ((thanh tuong) or (thanh tung)) quan dung ((trong quan) OR (tong quan)) toan cau*.