Perhaps you should try some spelling variations:
nang hoc » nang doc, nang luc, dong hoc
qua cham » qua hai, qua cac, va cham
cham xuc » cam xuc, chat xuc, cham soc
hoc hoa » hoc khoa
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky
anh de » hanh de, anh ve, anh du

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sai ky)) nang hoc hoa. hieu qua cham xuc ban ((anh de) OR (anh d)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) or (sai ky)) nang hoc hoa. hieu qua cham xuc ban ((anh de) OR (anh d)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sai ky)) nang hoc hoa. hieu qua cham xuc ban ((anh de) OR (anh d)) cua tre*.