Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
dua tren » dung tren
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
van lam » van nam
lam xuc » cam xuc, lam duoc
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ly nang xa hoi. hieu van lam xuc ban hanh vi ((cua tre) or (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly nang xa hoi. hieu van lam xuc ban hanh vi ((cua tre) OR (dua tren)).
• Adding a wildcard symbol may retrieve word variants: thu sach ly nang xa hoi. hieu van lam xuc ban hanh vi ((cua tre) or (dua tren))*.