Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
canh tinh » hanh tinh, manh tinh, canh tranh
vat nhung » va nhung, vap nhung, vai nhung
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
tinh vat » trinh vat, sinh vat, tinh va
toan ban » van ban
so bien » mot bien
bo bien » mot bien, pho bien, bat bien

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: ((so bien) OR (((bo bien) OR (che bien)))) tinh - canh tinh vat nhung cong vang toan ban~.
• Adding a wildcard symbol may retrieve word variants: ((so bien) or (((bo bien) or (che bien)))) tinh - canh tinh vat nhung cong vang toan ban*.