Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
ban banh » ban hanh, ban anh, ban danh
banh vi » hanh vi, ban vi, benh vi
xuc ban » duc ban, cuc ban, quoc ban
lam xuc » cam xuc, lam duoc
tu sach » thu sach, su sach, te sach
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
cua tre » cua te, cuu tre, cua triet
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) OR (ty hang)) o hoi. ((hieu van) or (lieu va)) lam xuc ban banh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) o hoi. ((hieu van) OR (lieu va)) lam xuc ban banh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty hang)) o hoi. ((hieu van) or (lieu va)) lam xuc ban banh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty hang)) o hoi. ((hieu van) or (lieu va)) lam xuc ban banh vi cua tre*.