Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
hanh noi » ha noi, hanh vi, nang noi
hanh doi » thanh doi, hang doi, hanh moi
xuc ban » duc ban, cuc ban, quoc ban
tu sach » thu sach, su sach, te sach
va cham » va chat, va tham
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet

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