Perhaps you should try some spelling variations:
luan trong » quan trong, luat trong, luong trong
luan tuong » luan luong, luat thuong, xuan truong
theo tien » theo tieu, thuc tien, theo tcvn
hanh tang » hanh trang, anh tang, hanh mang
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: theo tien thinh - hanh tang ((luan trong) OR (luan tuong)) cong dan toan cau~.
• Adding a wildcard symbol may retrieve word variants: theo tien thinh - hanh tang ((luan trong) or (luan tuong)) cong dan toan cau*.