Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, hieu ve
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chay tren, chau tho, cho tre
ly nang » ky nang, ly hang, ly quang
ly vang » ly hang, ly van, ly quang
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ly nang) or (ly vang)) x hoi. ((hieu van) or (lieu va)) cac duc va hanh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ly nang) OR (ly vang)) x hoi. ((hieu van) OR (lieu va)) cac duc va hanh lai chau tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ly nang) or (ly vang)) x hoi. ((hieu van) or (lieu va)) cac duc va hanh lai chau tre*.