Perhaps you should try some spelling variations:
hoc chieu » hoc thieu, ho chieu, hoc dieu
canh manh » lanh manh, canh tranh, cach mang
cua nhung » va nhung
manh cua » doanh cua, ban cua
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

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 chieu) OR (hoc hien)) xanh - canh manh cua nhung ((cong dan) OR (cong san)) toan cau~.
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (hoc hien)) xanh - canh manh cua nhung ((cong dan) or (cong san)) toan cau*.