Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach ty, sach kem
va hanh » van hanh, va thanh, va danh
van cam » van nam, van lam, van cau
cua cau » cua cac, cua chu, cua cay
xuc va » duc va, tuc va, luc va
o hoc » co hoc, mo hoc, so hoc
o hoi » co hoi, o hai, o hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach y)) nang ((o hoi) or (o hoc)). hieu van cam xuc va hanh dai cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang ((o hoi) OR (o hoc)). hieu van cam xuc va hanh dai cua cau.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) nang ((o hoi) or (o hoc)). hieu van cam xuc va hanh dai cua cau*.