Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh tue » hanh tu, hanh tuyen, hanh theo
sach kem » hanh kem
tue cua » te cua
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
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 cam ((xuc va) OR (luc va)) 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 cam ((xuc va) OR (luc va)) hanh tue cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach kem) or (sac ky)) nang xa hoi. hieu van cam ((xuc va) OR (luc va)) hanh tue cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach kem) or (sac ky)) nang xa hoi. hieu van cam ((xuc va) OR (luc va)) hanh tue cua tre*.