Perhaps you should try some spelling variations:
xuan truong » xa truong, duong truong
hanh trang » thanh trung, canh tranh, hanh trinh
luan trong » quan trong, luat trong, luan tuong
theo bien » thieu bien, theo tieu, che bien
bien tinh » bi tinh, yen tinh, diep tinh
cong tac » cong ty
tac toan » tap toan, tam toan, hach 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 bien tinh - hanh trang ((luan trong) OR (xuan truong)) cong tac toan cau~.
• Adding a wildcard symbol may retrieve word variants: theo bien tinh - hanh trang ((luan trong) or (xuan truong)) cong tac toan cau*.