Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
hien xanh » hien hanh, hien nhanh, chieu xanh
cua trung » cua truong, xuan trung, cua nhung
dung cua » dung luan, dung cho
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than ban » thanh ban, toan ban, than man

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - thanh dung cua trung ((cong dan) OR (cong san)) ((than ban) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh dung cua trung ((cong dan) OR (cong san)) ((than ban) OR (van ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh dung cua trung ((cong dan) OR (cong san)) ((than ban) or (van ban))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh dung cua trung ((cong dan) OR (cong san)) ((than ban) or (van ban))*.