Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
van lam » van nam
lam xuc » cam xuc, lam duoc
va hanh » van hanh, va thanh, va danh
v nang » va nang, vu nang, van nang
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
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: ((so sach) or (bo sach)) ((v nang) or (van ban)) x hoi. hieu van lam xuc va hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ((v nang) OR (van ban)) x hoi. hieu van lam xuc va hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (bo sach)) ((v nang) or (van ban)) x hoi. hieu van lam xuc va hanh vi cua vat*.