Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nam luc » nang luc, nhan luc, nam thuc
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
anh vi » hanh vi, anh ve, anh vu
anh va » hanh va

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 ho. hieu van nam luc van ((anh vi) or (anh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x ho. hieu van nam luc van ((anh vi) OR (anh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x ho. hieu van nam luc van ((anh vi) or (anh va)) cua tre*.