Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien xanh » hien hanh, hien nhanh, chieu xanh
thanh lap » thanh san, phan lap, thanh hai
cua tong » cua cong, cua dong, cua song
cua nong » cua cong, cuu nong, cua dong
cong san » cong tac
than cap » khan cap, thanh cac, than cua

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

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