Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
su sach » so sach, vu sach
van cam » van nam, van lam, van dam
van cau » van dau, van hau, van chat
xuc van » duc van, luc van, vuc van
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.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang x hoi. hieu ((van cam) OR (van cau)) xuc van thanh san ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu ((van cam) OR (van cau)) xuc van 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) OR (van cau)) xuc van thanh san ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu ((van cam) OR (van cau)) xuc van thanh san ((cua tre) or (cua triet))*.