Perhaps you should try some spelling variations:
thien van » thi van
thanh dai » thanh hai, thanh tai, thanh dat
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
van cac » van hac, van cau, van bac
dac ban » cac ban, duc ban, da ban
dac san » dac sac, cac san, dac nhan

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 ly nang ((xa hoi) or (x ho)). thien van cac ((dac ban) OR (dac san)) thanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly nang ((xa hoi) OR (x ho)). thien van cac ((dac ban) OR (dac san)) thanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ly nang ((xa hoi) or (x ho)). thien van cac ((dac ban) OR (dac san)) thanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ly nang ((xa hoi) or (x ho)). thien van cac ((dac ban) OR (dac san)) thanh dai cua triet*.