Perhaps you should try some spelling variations:
van chat » cao chat
hieu van » hieu va, thien van, lieu va
chat xuc » chat huu, cam xuc, chao xu
hanh de » hanh ve, hanh kem
xuc ban » duc ban, cuc ban, quoc ban
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
anh de » anh d, anh ve, anh du
o hai » co hai, so hai, o lai
o hoi » co hoi, o hoc, o hoa

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