Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
tranh cac » trinh cac, thanh cac, tranh cai
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
than cau » phan cau, than cap, thanh chau
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: hoc chieu xanh - canh tranh cac truong ((cong dan) or (cong tan)) ((than cau) OR (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - canh tranh cac truong ((cong dan) OR (cong tan)) ((than cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - canh tranh cac truong ((cong dan) or (cong tan)) ((than cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - canh tranh cac truong ((cong dan) or (cong tan)) ((than cau) OR (toan cau))*.