Perhaps you should try some spelling variations:
duong manh » duong van
luan tuong » luan luong, luat thuong, xuan truong
cong danh » cuong danh, cong dan, cong thanh
theo chu » theo chieu, cho chu, chao chu
anh tang » anh bang, anh nang, anh sang
anh dang » anh dong, anh dung, anh bang
toan cau » toan cao, toan ban, toan tap
chu han » chu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu han - ((anh tang) or (anh dang)) luan tuong ((duong manh) or (cong danh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu han - ((anh tang) OR (anh dang)) luan tuong ((duong manh) OR (cong danh)) toan cau.
• Adding a wildcard symbol may retrieve word variants: theo chu han - ((anh tang) or (anh dang)) luan tuong ((duong manh) or (cong danh)) toan cau*.