Perhaps you should try some spelling variations:
te sach » toc sach
sach ty » sach y, sach tu, sach thu
hanh ve » hanh vi, hanh va, hanh kem
duc van » duc va, duc tan, duc manh
cac ban » cac dan, cac van, can ban
va cham » va chat, va tham
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
ve cua » le cua, de cua, te cua
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 ty nang ((x hoi) or (o hoi)). hieu va cham ((cac ban) or (duc van)) hanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((x hoi) OR (o hoi)). hieu va cham ((cac ban) OR (duc van)) hanh ve cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((x hoi) or (o hoi)). hieu va cham ((cac ban) or (duc van)) hanh ve cua tre*.