Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh dai » thanh hai, thanh tai, thanh dat
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van dam
van cau » van dau, van hau, van chat
duc ban » duc tan, duc van, dua ban
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang xa hoi. hieu ((van cam) OR (van cau)) duc ban thanh dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ((van cam) OR (van cau)) duc ban thanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ((van cam) OR (van cau)) duc ban thanh dai cua triet*.