Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh tai » thanh hai, thanh toan, doanh tai
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
xang xa » lang xa, mang xa, ang xa
van cam » van nam, van lam, van cau
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cua te, cuu tre, dua tren

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) or (so sanh)) ty xang xa hoi. hieu van cam xuc ban thanh tai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ty xang xa hoi. hieu van cam xuc ban thanh tai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (so sanh)) ty xang xa hoi. hieu van cam xuc ban thanh tai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) ty xang xa hoi. hieu van cam xuc ban thanh tai ((cua tre) OR (cua triet))*.