Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
xuc van » duc van, luc van, vuc van
cua tu » cua tuc, cua su, cua te
cua cu » cua chu, cua cau, cua su
x hoi » xa hoi, o hoi, x ho

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

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