Perhaps you should try some spelling variations:
phap duc » pham duc, phan duc, phap doc
van dinh » van minh, van dich, xuan dinh
tu sach » thu sach, su sach, te sach
va dinh » va kinh, va tinh, vu dinh
sach ty » sach y, sach tu, sach thu
va danh » va dan, va hanh, dia danh
va phap » va phat, ban phap
hieu va » lieu va, hieu qua
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
vi cua » vai cua, di cua
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 ty nang o hoi. hieu va phap duc ((va danh) or (((va dinh) or (van dinh)))) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang o hoi. hieu va phap duc ((va danh) OR (((va dinh) OR (van dinh)))) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang o hoi. hieu va phap duc ((va danh) or (((va dinh) or (van dinh)))) vi cua tre*.