Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh vai » hanh vi, hanh va, hanh tai
tai khoi » tai khoa, mai khoi, tao khoi
ve cham » va cham, ve chat, vu cham
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
tai hoi » dai hoi, tai hai, tai hoe
ve cai » va cai, ve cac, ve tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang ((tai hoi) OR (tai khoi)). hieu ((ve cai) or (ve cham)) duc va hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((tai hoi) OR (tai khoi)). hieu ((ve cai) OR (ve cham)) duc va hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((tai hoi) OR (tai khoi)). hieu ((ve cai) or (ve cham)) duc va hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((tai hoi) OR (tai khoi)). hieu ((ve cai) or (ve cham)) duc va hanh vai cua triet*.