Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thi hanh » thi thanh
su triet » su viet, su tien, ve triet
sach tay » xach tay, sach hay, sach nay
tay lang » tai lang, tay tang, tay quang
va triet » va thiet, va trien, ve triet
thi van » thi lan, thi nang
lang xa » lang ha, dang xay, lang van
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
tuc va » thuc va, truc va, tuc xa

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: toc sach tay lang xa hoi. ((thi van) OR (thi hanh)) cam tuc va hanh va ((su triet) OR (va triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tay lang xa hoi. ((thi van) OR (thi hanh)) cam tuc va hanh va ((su triet) or (va triet))~".
• Adding a wildcard symbol may retrieve word variants: toc sach tay lang xa hoi. ((thi van) OR (thi hanh)) cam tuc va hanh va ((su triet) or (va triet))*.