Perhaps you should try some spelling variations:
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, te sach, tu cach
cuc ban » cua ban, cac ban, cuu ban
lam cuc » lam cua, lam duoc, pham cuc
van lam » van nam
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) tri ((nang xa) OR (lang xa)) hoi. hieu van lam cuc ban hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) tri ((nang xa) or (lang xa)) hoi. hieu van lam cuc ban hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) tri ((nang xa) or (lang xa)) hoi. hieu van lam cuc ban hanh vi cua tre*.