Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
hanh tai » thanh tai, hang tai, han tai
sach ty » sach y, sach tu, sach thu
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
va cam » va cham, va cac, va cao
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 ty ((nang xa) OR (nang x)) hoi. hieu va cam xuc va hanh tai cua te~.
• Adding a wildcard symbol may retrieve word variants: doc sach ty ((nang xa) or (nang x)) hoi. hieu va cam xuc va hanh tai cua te*.