Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua dieu
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va

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 ky tang ((ma hoi) OR (xa hoi)). hieu ve cam xuc va hanh vi ((cua viet) OR (cua vat))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky tang ((ma hoi) OR (xa hoi)). hieu ve cam xuc va hanh vi ((cua viet) OR (cua vat))".
• Adding a wildcard symbol may retrieve word variants: so sach ky tang ((ma hoi) OR (xa hoi)). hieu ve cam xuc va hanh vi ((cua viet) OR (cua vat))*.