Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cach hoc » cach thuc, cach thoi, dich hoc
va thanh » gia thanh, ban thanh, le thanh
su sach » so sach, vu sach
va cach » va cac
va tinh » may tinh
vai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, ma hoa, me hoi

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 y nang ((ma hoi) or (xa hoi)). lieu va cach hoc ((va thanh) OR (va tinh)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((ma hoi) OR (xa hoi)). lieu va cach hoc ((va thanh) OR (va tinh)) vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ((ma hoi) or (xa hoi)). lieu va cach hoc ((va thanh) OR (va tinh)) vai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((ma hoi) or (xa hoi)). lieu va cach hoc ((va thanh) OR (va tinh)) vai cua triet*.