Perhaps you should try some spelling variations:
tranh cua » doanh cua, manh cua
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
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: ((doc hieu) or (theo tieu)) xanh - canh tranh cua dung cong dan ((than cau) OR (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo tieu)) xanh - canh tranh cua dung cong dan ((than cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (theo tieu)) xanh - canh tranh cua dung cong dan ((than cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo tieu)) xanh - canh tranh cua dung cong dan ((than cau) OR (toan cau))*.