Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
lam thuc » lam thuoc, am thuc, nam thuc
van lam » van nam
sach ty » sach y, sach tu, sach thu
va danh » va dan, va hanh, dia danh
va dinh » van dinh, va kinh, va tinh
ty nang » ky nang, ty xang, ty hang
bai cua » ban cua, bai ca, hai cua
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: thuat sach ty nang x hoi. hieu van lam thuc ((va danh) or (va dinh)) ((bai cua) or (dai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty nang x hoi. hieu van lam thuc ((va danh) OR (va dinh)) ((bai cua) OR (dai cua)) viet.
• Adding a wildcard symbol may retrieve word variants: thuat sach ty nang x hoi. hieu van lam thuc ((va danh) or (va dinh)) ((bai cua) or (dai cua)) viet*.