Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
cua tuong » cua truong, cua thuong, cua huong
doc hieu » toc thieu, hoc thieu, hoc hien
tung cua » trung cua, tuong cua, dung cua
cong dan » cong san, cong tan, huong dan
dong san » cong san, dong bang, dong von
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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 xanh - thanh tung cua tuong ((cong dan) or (dong san)) ((than cau) OR (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh tung cua tuong ((cong dan) OR (dong san)) ((than cau) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - thanh tung cua tuong ((cong dan) or (dong san)) ((than cau) OR (phan cau))".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh tung cua tuong ((cong dan) or (dong san)) ((than cau) OR (phan cau))*.