Perhaps you should try some spelling variations:
doc sach » hoc sach, nuoc sach, dac sac
toc sach » hoc sach, thuoc sach, nuoc sach
hanh tai » thanh tai, hang tai, han tai
hieu van » hieu va, thien van, lieu va
cau xuc » cam xuc, cau luc, cau truc
tai cua » thai cua, tai cuc, tri cua
nang xa » lang xa, nang ma, mang xa
va hanh » van hanh, va thanh, va danh
van cau » van dau, van hau, van chat
xuc va » duc va, tuc va, luc va
cua te » cua tu

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: ((doc sach) OR (toc sach)) ty ((nang xa) OR (nang x)) hoi. hieu van cau xuc va hanh tai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc sach) OR (toc sach)) ty ((nang xa) or (nang x)) hoi. hieu van cau xuc va hanh tai cua te~".
• Adding a wildcard symbol may retrieve word variants: ((doc sach) OR (toc sach)) ty ((nang xa) or (nang x)) hoi. hieu van cau xuc va hanh tai cua te*.