Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
thanh de » hanh de, thanh ve, thanh do
nang xa » nang x, lang xa, nang ma
nam xuc » cam xuc, nam xua, nam thuc
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cua te, cuu tre, dua tren
sac ky » cac ky, sai ky

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 ((hanh kem) OR (sac ky)) nang xa hoi. hieu van nam xuc ban thanh de ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((hanh kem) or (sac ky)) nang xa hoi. hieu van nam xuc ban thanh de ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: tu ((hanh kem) or (sac ky)) nang xa hoi. hieu van nam xuc ban thanh de ((cua tre) OR (cua triet))*.