Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
sach ty » sach tu, sach thu, xach tay
va dan » ca dan, va dao, va dau
mai ve » mai va, moi ve, dai ve
van am » van nam, van lam, van dam
x hoi » xa hoi, o hoi, x ho

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 ((sach ty) OR (sach y)) nang x hoi. hieu van am thuc ((va dan) OR (va hanh)) mai ve triet~.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) nang x hoi. hieu van am thuc ((va dan) or (va hanh)) mai ve triet*.