Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh van » trinh han, trinh quan, trinh toan
tranh va » tranh van, trang va, trinh va
cong dan » cong san, cong tan, huong dan
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: hoc chieu xanh - canh ((tranh va) OR (trinh van)) thuong ((cong dan) OR (cong tac)) toan cau~.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - canh ((tranh va) or (trinh van)) thuong ((cong dan) or (cong tac)) toan cau*.