Perhaps you should try some spelling variations:
van thanh » van tuan
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, dua tren
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: su sach y nang x hoi. hieu van cam xuc ((van thanh) OR (ban thanh)) san ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. hieu van cam xuc ((van thanh) OR (ban thanh)) san ((cua tre) or (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu van cam xuc ((van thanh) OR (ban thanh)) san ((cua tre) or (cua triet))*.