Perhaps you should try some spelling variations:
cuon sach » duong sach, cuoc cach, co sach
cua triet » cua viet, va triet
manh cua » doanh cua, ban cua
su triet » su viet, su tien, ve triet
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cham lo » cham o, cam lo, cham soc
va manh » van manh, va danh, va hanh
mang xa » lang xa, mang may, dang xay
ve cham » va cham, ve chat, vu cham
lo va » lo van, lao va, ly va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: cuon sach ky ((mang xa) or (nang ma)) hoi. hieu ve cham lo va manh cua ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cuon sach ky ((mang xa) OR (nang ma)) hoi. hieu ve cham lo va manh cua ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: cuon sach ky ((mang xa) or (nang ma)) hoi. hieu ve cham lo va manh cua ((cua triet) or (su triet))*.