Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh
sinh cua » manh cua, dinh cuu, sinh va
tu sach » thu sach, su sach, te sach
van lam » van nam
lam tuc » lam thuoc, lam truoc, luat tuc
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu van lam tuc ((((va thanh) OR (le thanh))) OR (va tinh)) sinh cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. hieu van lam tuc ((((va thanh) OR (le thanh))) or (va tinh)) sinh cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu van lam tuc ((((va thanh) OR (le thanh))) or (va tinh)) sinh cua tre*.