Perhaps you should try some spelling variations:
truong luan » truong quan, truong luat, truong quang
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
trung lap » trung cap, truong lam, truong lop
trong van » trong cac
van toan » van tuan, van tan, van thanh
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: hoc ((chieu xanh) OR (chieu sach)) - thanh ((trung lap) OR (truong luan)) dung trong van toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu sach)) - thanh ((trung lap) or (truong luan)) dung trong van toan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu sach)) - thanh ((trung lap) or (truong luan)) dung trong van toan cao*.