Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
hoc sach » hoc sinh, hoc cac, hoc anh
van dinh » van minh, van dich, va dinh
dia danh » dia ban, gia dinh
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach y nang o hoi. hieu va tham thuc ((((va danh) or (dia danh))) or (van dinh)) vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y nang o hoi. hieu va tham thuc ((((va danh) OR (dia danh))) OR (van dinh)) vai cua te.
• Adding a wildcard symbol may retrieve word variants: hoc sach y nang o hoi. hieu va tham thuc ((((va danh) or (dia danh))) or (van dinh)) vai cua te*.