Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
hai cua » thai cua, dai cua, hoi cua
bai cua » ban cua, dai cua, bai ca
cam duc » cam xuc, cao duc, pham duc
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
duc ca » duc cac, duc va, duc ha
ca dan » cac dan, ca dao
ve cam » ve cham, ve cac, va cam

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: so sach thu ((nang xa) OR (lang xa)) hoi. hieu ve cam duc ca dan ((bai cua) OR (hai cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thu ((nang xa) OR (lang xa)) hoi. hieu ve cam duc ca dan ((bai cua) or (hai cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: so sach thu ((nang xa) OR (lang xa)) hoi. hieu ve cam duc ca dan ((bai cua) or (hai cua)) triet*.