Perhaps you should try some spelling variations:
phan thuc » nhan thuc, phap thuc, pham thuc
hieu van » hieu va, thien van, lieu va
hanh dai » hanh tai, hanh dao, vanh dai
hanh nam » thanh nam, hanh lam, hanh ngay
van phan » van phong, van thanh, luan phan
hanh cam » hanh cham, hanh lam, hanh cac
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((hanh cam) or (hanh nam)) nang ((x hoi) OR (o hoi)). hieu van phan thuc va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((hanh cam) OR (hanh nam)) nang ((x hoi) OR (o hoi)). hieu van phan thuc va hanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((hanh cam) or (hanh nam)) nang ((x hoi) OR (o hoi)). hieu van phan thuc va hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: so ((hanh cam) or (hanh nam)) nang ((x hoi) OR (o hoi)). hieu van phan thuc va hanh dai cua tre*.