Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet, va triet
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu 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) OR (su sach)) y nang xa hoi. hieu ((van cam) or (van cau)) duc ban thanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su 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) OR (su 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) OR (su sach)) y nang xa hoi. hieu ((van cam) or (van cau)) duc ban thanh dai cua triet*.