Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hoc hoi » hoc khoi, hoc hoa, hoc noi
van cau » van hau, van chat, toan cau
van dau » van dao, phan dau
ho hoi » hoa hoi, hoi hoi, co hoi

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 ky nang ((ho hoi) OR (hoc hoi)). hieu ((van cau) or (van dau)) duc va thanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ho hoi) OR (hoc hoi)). hieu ((van cau) OR (van dau)) duc va thanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((ho hoi) OR (hoc hoi)). hieu ((van cau) or (van dau)) duc va thanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ho hoi) OR (hoc hoi)). hieu ((van cau) or (van dau)) duc va thanh dai cua triet*.