Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cac, va cao, va cai
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. lieu ((va cam) OR (va cham)) 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. lieu ((va cam) OR (va cham)) xuc va hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: so sach y nang ma hoi. lieu ((va cam) OR (va cham)) xuc va hanh vi cua viet*.