Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sang tao » hang tai
sach tu » sach thu, cach tu, sach ty
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
ve cao » ve bao, ve cac, ve co
va cao » va cac, va co, va dao
va anh » van anh, va danh, va hanh
anh vi » hanh vi, anh va, anh ve
vi ve » va ve, gi ve, ve ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach tu ((nang xa) or (sang tao)) hoi. hieu ((ve cao) OR (va cao)) duc va anh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu ((nang xa) OR (sang tao)) hoi. hieu ((ve cao) OR (va cao)) duc va anh vi ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tu ((nang xa) or (sang tao)) hoi. hieu ((ve cao) OR (va cao)) duc va anh vi ve triet".
• Adding a wildcard symbol may retrieve word variants: su sach tu ((nang xa) or (sang tao)) hoi. hieu ((ve cao) OR (va cao)) duc va anh vi ve triet*.