Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
cua trung » cua truong, xuan trung, cua nhung
hanh ban » thanh ban, hang ban, hanh san
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac
ban cua » ban quan

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