Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu xanh » chieu xanh, hieu manh, hieu nganh
trung cua » truong cua, trung tuan, trung cap
cua trong » cua truong, cua trung, qua trong
thanh chu » thanh chau, thanh cha, thanh thu
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
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 xanh - thanh trung cua trong ((cong dan) or (cong tan)) ((thanh chu) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh trung cua trong ((cong dan) OR (cong tan)) ((thanh chu) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh trung cua trong ((cong dan) or (cong tan)) ((thanh chu) or (toan cau))*.