Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua triet » cua viet, su triet, va triet
ban hang » ngan hang
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
cao xuc » cam xuc, cao duc, cao suc
cua tre » cua te, cuu tre, dua tren
y nang » ky nang, ly nang, v nang
va cao » va cac, va co, va dao
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: so sach y nang x hoi. hieu va cao xuc ((van thanh) OR (ban hang)) san ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang x hoi. hieu va cao xuc ((van thanh) OR (ban hang)) san ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: so sach y nang x hoi. hieu va cao xuc ((van thanh) OR (ban hang)) san ((cua tre) OR (cua triet))*.