Perhaps you should try some spelling variations:
cuu thuc » cuu tac
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, ban hanh
van cam » van nam, van lam, van cau
tu sach » thu sach, su sach, te sach
va danh » va dinh, dia danh, va thanh
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
va dan » ca dan, va dao, va dau
vi cuu » vi luu, vinh cuu
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: tu sach y nang o hoi. hieu van cam xuc ((((va danh) or (va hanh))) or (va dan)) vi cuu thuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang o hoi. hieu van cam xuc ((((va danh) OR (va hanh))) OR (va dan)) vi cuu thuc.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang o hoi. hieu van cam xuc ((((va danh) or (va hanh))) or (va dan)) vi cuu thuc*.