Perhaps you should try some spelling variations:
ban hanh » ban hang
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cam luc » cam xuc, cau luc
luc ban » duc ban, cuc ban, luc bat
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
de cua » le cua, te cua, dieu cua
x hoi » xa hoi, x ho, 5 hoi
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: te sach ky nang ((x hoi) OR (o hoi)). hieu ve cam luc ban hanh de cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((x hoi) OR (o hoi)). hieu ve cam luc ban hanh de cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((x hoi) OR (o hoi)). hieu ve cam luc ban hanh de cua tre*.