Perhaps you should try some spelling variations:
phong cong » phong chong, thong cong, chong cong
chieu xanh » chieu sach, chieu sang, chieu tinh
thien anh » thien danh, tien anh, thien thanh
tranh van » tran van, trinh van, thanh van
van phong » van dong, hai phong
cong dan » cong san, cong tan, huong dan
khan cap » than cap, khoan cam, phan cac
khan ap » han ap, khan dam

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) or (thien anh)) - canh tranh van phong cong dan ((khan cap) OR (khan ap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (thien anh)) - canh tranh van phong cong dan ((khan cap) OR (khan ap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (thien anh)) - canh tranh van phong cong dan ((khan cap) OR (khan ap))".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (thien anh)) - canh tranh van phong cong dan ((khan cap) OR (khan ap))*.