Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tu cach » tu cac
su sach » so sach, vu sach
van cam » van nam, van lam, van cau
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
va viet » hoa viet, san viet, mai viet
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va
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 cach) or (su sach)) y nang x hoi. hieu van cam xuc va hanh di ((cua vat) or (va viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) y nang x hoi. hieu van cam xuc va hanh di ((cua vat) OR (va viet)).
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) y nang x hoi. hieu van cam xuc va hanh di ((cua vat) or (va viet))*.