Perhaps you should try some spelling variations:
cua viet » hoa viet, cua vat, cua dieu
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
ca viet » va viet, co viet, hoa viet
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) y nang x hoi. hieu va cam duc va hanh vi ((cua viet) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y nang x hoi. hieu va cam duc va hanh vi ((cua viet) OR (ca viet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) y nang x hoi. hieu va cam duc va hanh vi ((cua viet) or (ca viet))*.