Perhaps you should try some spelling variations:
sach kem » hanh kem
hieu van » hieu va, thien van, lieu va
hanh tue » hanh tu, hanh tuyen, hanh theo
nang xa » nang x, lang xa, nang ma
xuc van » duc van, luc van, thuc van
xuc ban » duc ban, cuc ban, quoc ban
tue cua » te cua
cua tre » cua te, cuu tre, cua triet
sai ky » sac 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 (sai ky)) nang xa hoi. hieu van nam ((xuc van) OR (xuc ban)) hanh tue cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach kem) OR (sai ky)) nang xa hoi. hieu van nam ((xuc van) OR (xuc ban)) hanh tue cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach kem) or (sai ky)) nang xa hoi. hieu van nam ((xuc van) OR (xuc ban)) hanh tue cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach kem) or (sai ky)) nang xa hoi. hieu van nam ((xuc van) OR (xuc ban)) hanh tue cua tre*.