Perhaps you should try some spelling variations:
khien bang » phien ban, khien dong
khanh luan » khanh thuan, doanh luan, khau luan
hoc khien » hoc hien, hoc nghien, hoc thieu
hang luan » tang luan, dung luan
dong cong » duong cong, dung cong, dang cong
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 khien bang - ((khanh luan) OR (hang luan)) van dong cong dan toan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc khien bang - ((khanh luan) OR (hang luan)) van dong cong dan toan cau*.