Perhaps you should try some spelling variations:
ve triet » va trien, su triet
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
cao duc » dao duc, cao suc, giao duc
sach tu » sach thu, cach tu, sach ty
tu sach » thu sach, su sach, te sach
tang ma » mang may, tang van
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
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: tu sach tu ((nang xa) or (tang ma)) hoi. hieu ve ((cao duc) or (pham duc)) va thanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu ((nang xa) OR (tang ma)) hoi. hieu ve ((cao duc) OR (pham duc)) va thanh vi ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sach tu ((nang xa) or (tang ma)) hoi. hieu ve ((cao duc) or (pham duc)) va thanh vi ve triet*.