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
thu sach » tu sach, thuat sach, thuoc sach
van cac » van hac, van bac, dan cac
van cau » van dau, van hau, van chat
dac ban » cac ban, dac san, duc 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: thu sach y nang ((xa hoi) or (x ho)). hieu ((van cac) OR (van cau)) dac ban thanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((xa hoi) OR (x ho)). hieu ((van cac) OR (van cau)) dac ban thanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ((xa hoi) or (x ho)). hieu ((van cac) OR (van cau)) dac ban thanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((xa hoi) or (x ho)). hieu ((van cac) OR (van cau)) dac ban thanh dai cua triet*.