Perhaps you should try some spelling variations:
va hanh » van hanh, va thanh, va danh
van lam » van nam
van cam » van nam, van cau, van dam
tu sach » thu sach, su sach, te sach
vu nang » vuc nang, va nang, vu dang
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
v nang » va nang, van nang, voi nang
vi cua » vai cua, di cua

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 ((v nang) OR (vu nang)) xa hoi. hieu ((van cam) or (van lam)) xuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((v nang) OR (vu nang)) xa hoi. hieu ((van cam) OR (van lam)) xuc va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((v nang) OR (vu nang)) xa hoi. hieu ((van cam) or (van lam)) xuc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((v nang) OR (vu nang)) xa hoi. hieu ((van cam) or (van lam)) xuc va hanh vi cua tre*.