Perhaps you should try some spelling variations:
tuan thuong » than thuong, toan thuong, thanh thuong
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
hoang anh » hoang minh, hoang van
cong dan » cong san, cong tan, huong dan
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: doi chieu sang - ((thanh trung) or (thanh tung)) tuan thuong ((hoang anh) or (cong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((thanh trung) OR (thanh tung)) tuan thuong ((hoang anh) OR (cong dan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((thanh trung) or (thanh tung)) tuan thuong ((hoang anh) or (cong dan)) toan cao*.