Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
van cau » van dau, van hau, van chat
cau xuc » cam xuc, cau luc, cau truc
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
o hoi » co hoi, o hoc, o hai

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

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