Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
tu nang » tru nang, tu nong, tu nano
van cam » van nam, van lam, van cau
xuc van » duc van, vuc van, xuc ban
luc van » luoc van, luu van, duc van
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

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