Perhaps you should try some spelling variations:
sach kem » hanh kem
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
hanh tue » hanh tu, hanh tuyen, hanh theo
nang xa » nang x, lang xa, nang ma
nam xuc » cam xuc, nam xua, nam thuc
xuc van » duc van, luc van, xuc ban
tue cua » te cua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach kem) or (sac ky)) nang xa hoi. hieu van nam xuc van hanh tue cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach kem) OR (sac ky)) nang xa hoi. hieu van nam xuc van hanh tue cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach kem) or (sac ky)) nang xa hoi. hieu van nam xuc van hanh tue cua tre*.