Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
tu sach » thu sach, su sach, te sach
nang co » nang cao, nang doc, nang noi
hieu va » lieu va, hieu qua
va cham » va chat, va tham
xuc ban » duc ban, cuc ban, quoc ban
ban dan » ban hang, ban hanh, ban quan
dan sai » danh sai, doan sai, dan tai
sai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
nang o » nang ho, nang ro, lang o

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 y ((((nang o) OR (nang x))) or (nang co)) hai. hieu va cham xuc ban dan sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((((nang o) OR (nang x))) OR (nang co)) hai. hieu va cham xuc ban dan sai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((((nang o) OR (nang x))) or (nang co)) hai. hieu va cham xuc ban dan sai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((((nang o) OR (nang x))) or (nang co)) hai. hieu va cham xuc ban dan sai cua tre*.