Perhaps you should try some spelling variations:
hien sang » hien trang, khien bang, chieu sang
canh manh » lanh manh, canh tranh, cach mang
dung cong » dung trong
manh cua » doanh cua, ban cua
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
toan cau » toan ban, toan tap, toan tai
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 hien sang - canh manh cua dung cong dan ((toan cau) OR (toan cao))~.
• Adding a wildcard symbol may retrieve word variants: hoc hien sang - canh manh cua dung cong dan ((toan cau) or (toan cao))*.