Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach ty, sach kem
van cau » van dau, van hau, van chat
va danh » va dinh, va dan, va hanh
va anh » van anh, va hanh, va banh
di cua » dai cua, doi cua, de cua
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: thu ((sach ky) OR (sach y)) nang x hoi. hieu van cau truc ((va danh) OR (va anh)) di cua vat~.
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sach y)) nang x hoi. hieu van cau truc ((va danh) or (va anh)) di cua vat*.