Perhaps you should try some spelling variations:
trinh vi » trinh va, trinh ve, trinh viet
cuu tre » cua tre, cau tren, cau treo
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va, hieu van
tinh vi » tinh voi, tinh va, dinh vi
thuc va » thuc vat, thuc dan, thuc day
tu nam » su nam
nam ky » cam ky, nam ly
ma hoi » mai hoi, xa hoi, ma hoa
ve am » va am

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: tu nam ky nang ((ma hoi) OR (dai hoi)). hieu ve am thuc va ((tinh vi) OR (trinh vi)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu nam ky nang ((ma hoi) or (dai hoi)). hieu ve am thuc va ((tinh vi) OR (trinh vi)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu nam ky nang ((ma hoi) or (dai hoi)). hieu ve am thuc va ((tinh vi) OR (trinh vi)) cuu tre*.