Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, co sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve chao » ve chat, ve cham, ve cho
va hanh » va thanh, va danh, ban hanh
tai cua » thai cua, tai cuc, tri cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach tu nang xa hoi. hieu ve chao xu ((va hanh) or (van hanh)) tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tu nang xa hoi. hieu ve chao xu ((va hanh) OR (van hanh)) tai cua triet.
• Adding a wildcard symbol may retrieve word variants: so sach tu nang xa hoi. hieu ve chao xu ((va hanh) or (van hanh)) tai cua triet*.