Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cham xuc » cam xuc, chat xuc, cham soc
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu tu » chieu tu, hieu tuc, hien tu
tu cham » toc cham, thi cham
va luan » vay luan, van luan, va quan
va viet » hoa viet, san viet, mai viet
xuc va » duc va, tuc va, luc va
van va » van vat, van van, ban va

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 sach) OR (toc sach)) ky nang xa hoi. hieu tu cham xuc va luan van va viet~.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky nang xa hoi. hieu tu cham xuc va luan van va viet*.