Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, le thanh
sinh cua » manh cua, dinh cuu, sinh va
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, te sach, tu cach
va tinh » may tinh
lam tuc » lam thuoc, lam truoc, luat tuc
su sach » so sach, vu sach
van lam » van nam
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.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) y nang x hoi. hieu van lam tuc ((va thanh) or (va tinh)) sinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y nang x hoi. hieu van lam tuc ((va thanh) OR (va tinh)) sinh cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) y nang x hoi. hieu van lam tuc ((va thanh) or (va tinh)) sinh cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) y nang x hoi. hieu van lam tuc ((va thanh) or (va tinh)) sinh cua tre*.