Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
chat thuc » thuat thuc, nhan thuc, chat thai
cua triet » cua viet, su triet, va triet
day manh » van manh, duc manh, ha manh
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
day dan » day danh, dao dan, cay dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky nang xa hoi. hieu va chat thuc ((day dan) or (day manh)) dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang xa hoi. hieu va chat thuc ((day dan) OR (day manh)) dai cua triet.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang xa hoi. hieu va chat thuc ((day dan) or (day manh)) dai cua triet*.