Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
te san » te ban, ke san, tu san
x hoi » xa hoi, o hoi, x ho
va am » va lam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (te san)) ky nang x hoi. hieu ((va am) or (va cam)) thuc va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (te san)) ky nang x hoi. hieu ((va am) OR (va cam)) thuc va hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (te san)) ky nang x hoi. hieu ((va am) or (va cam)) thuc va hanh dai cua tre*.