Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, co sach
mai hoi » mai khoi, dai hoi, lai hoi
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ma hoi » xa hoi, ma hoa, me hoi
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
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)). lieu va cam xuc va hanh vi cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang ((ma hoi) OR (mai hoi)). lieu va cam xuc va hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: so sach y nang ((ma hoi) OR (mai hoi)). lieu va cam xuc va hanh vi cua viet*.