Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
van cam » van nam, van lam, van cau
xuc ban » duc ban, cuc ban, quoc ban
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: su sach y nang x hoi. hieu van cam xuc ban thanh san ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu van cam xuc ban thanh san ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu van cam xuc ban thanh san ((cua tre) or (su triet))*.