Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
hoc thieu » toc thieu, hoc hien
luan nang » luan van, van nang, luan san
nang cong » nang song, dang cong, bang cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 tieu) OR (hoc thieu)) xanh - canh tranh luan nang cong dan than cau~.
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (hoc thieu)) xanh - canh tranh luan nang cong dan than cau*.