Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
va thai » van thai, va tai, va tham
danh vi » hanh vi, dinh vi, danh di
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi
son va » song va, lon va, son ha
vi cua » vai cua, di cua

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