Perhaps you should try some spelling variations:
vanh dai » van dai, vanh tai, lanh dao
cham tuc » nham thuc, pham thuc, tham thuc
tu sach » thu sach, su sach, te sach
va vanh » va van, va danh, va hanh
hieu va » lieu va
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
s_ hai » su hai, so hai
tuc va » thuc va, truc va, tuc xa

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 ty nang ((_ hai) OR (s_ hai)). ((hieu va) OR (hieu qua)) cham tuc va vanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ((_ hai) or (s_ hai)). ((hieu va) OR (hieu qua)) cham tuc va vanh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((_ hai) or (s_ hai)). ((hieu va) OR (hieu qua)) cham tuc va vanh dai cua tre*.