Perhaps you should try some spelling variations:
khien bang » phien ban, khien dong
khanh luan » khanh thuan, doanh luan, hang luan
hien sang » hien trang, chieu sang, thien bang
dung cong » dung trong
van dung » van dong, xay dung, tin dung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien sang) OR (khien bang)) - khanh luan van dung cong dan toan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sang) OR (khien bang)) - khanh luan van dung cong dan toan cau*.