Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
cua tre » cuu tre, cua triet, dua tren
tu bai » tu ban, tu bat, te bai
bai ky » ban ky, sai ky, bac ky
ma hoi » mai hoi, xa hoi, me hoi
cua te » cua tu
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 bai ky nang ((ma hoi) OR (ma hoa)). hieu ve am thuc va thanh vi ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu bai ky nang ((ma hoi) OR (ma hoa)). hieu ve am thuc va thanh vi ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: tu bai ky nang ((ma hoi) OR (ma hoa)). hieu ve am thuc va thanh vi ((cua tre) or (cua te))*.