Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh hung, hanh dung
thanh tung » thanh cong
khong cong » thong cong, khong cang, chong cong
hien xanh » hien hanh, hien nhanh, chieu xanh
cho khong » chu khong, nho khong, khoi khong
cong san » cong tac
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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 dung) OR (thanh tung)) cho khong cong san ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - ((thanh dung) OR (thanh tung)) cho khong cong san ((toan cau) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((thanh dung) OR (thanh tung)) cho khong cong san ((toan cau) or (toan ban))*.