Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
xuc ban » duc ban, cuc ban, quoc ban
ve chat » va chat, van chat
cua tre » cua te, cuu tre, cua triet
ve cham » va cham, vu cham, ve chim
ty nang » ky nang, ty xang, ty hang
nang o » nang co, nang ho, nang ro
anh te » anh tu, anh ve, anh le
anh ta » anh tu, anh va, anh tuan
o hoi » co hoi, o hoc, o hai

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 ty nang o hoi. hieu ((ve cham) or (ve chat)) xuc ban ((anh te) OR (anh ta)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang o hoi. hieu ((ve cham) OR (ve chat)) xuc ban ((anh te) OR (anh ta)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang o hoi. hieu ((ve cham) or (ve chat)) xuc ban ((anh te) OR (anh ta)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang o hoi. hieu ((ve cham) or (ve chat)) xuc ban ((anh te) OR (anh ta)) cua tre*.