Perhaps you should try some spelling variations:
te sach » toc sach
cao hoc » co hoc, cho hoc, chat hoc
hieu va » lieu va, hieu qua
nam luc » nang luc, nhan luc, nam thuc
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
va nam » van nam, ha nam, va nay
anh vi » hanh vi, anh va, anh vu
anh ve » hanh ve, anh va, anh viet

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 y nang cao hoc. hieu va nam luc van ((anh vi) OR (anh ve)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang cao hoc. hieu va nam luc van ((anh vi) OR (anh ve)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang cao hoc. hieu va nam luc van ((anh vi) OR (anh ve)) cua tre*.