Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
nhung don » nhung van, nhung bo
dang cong » dung cong
doan phan » doanh phan, toan phan, dan phan
doi chau » doi chieu, gioi chau, lai chau
trinh va » trinh van, trinh vat, trinh ve
phan cac » nhan cach, phan dau, phan lap
hoi chu » hoi chuc

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: ((doi chau) OR (hoi chu)) tinh - canh trinh va ((nhung don) OR (dang cong)) doan phan cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chau) OR (hoi chu)) tinh - canh trinh va ((nhung don) or (dang cong)) doan phan cac~".
• Adding a wildcard symbol may retrieve word variants: ((doi chau) OR (hoi chu)) tinh - canh trinh va ((nhung don) or (dang cong)) doan phan cac*.