Perhaps you should try some spelling variations:
thanh sinh » thanh binh, thanh tinh, thanh vinh
hieu van » hieu va, thien van, lieu va
sinh cua » manh cua, dinh cuu, sinh va
tu sach » thu sach, su sach, te sach
van lam » van nam
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
tuc va » thuc va, tuc xa, duc va
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 y nang x hoi. hieu van lam ((tuc va) OR (truc va)) thanh 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) OR (truc va)) thanh sinh cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu van lam ((tuc va) OR (truc va)) thanh sinh cua tre*.