Perhaps you should try some spelling variations:
cac trung » cac truong, dac trung, bac trung
cua triet » cua viet, su triet, va triet
trung va » truong va, trang va, trung ha
so sach » so sanh, bo sach, co sach
mai hoi » mai khoi, dai hoi, lai hoi
qua cac » cua cac
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ma hoi » xa hoi, ma hoa, me hoi
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: so sach y nang ((ma hoi) OR (mai hoi)). hieu qua cac trung va hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang ((ma hoi) OR (mai hoi)). hieu qua cac trung va hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach y nang ((ma hoi) OR (mai hoi)). hieu qua cac trung va hanh vi cua triet*.