Perhaps you should try some spelling variations:
thieu nien » thien nhien
nien cac » vien cac, dien cac, bien cac
van hanh » van thanh, ban hanh, van anh
ve triet » va trien, su triet
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
nang xa » lang xa, nang ma, mang xa
cac toi » cac thoi
toi van » thi van, tri van, doi 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: su sach tu ((nang xa) OR (nang x)) hoi. thieu nien cac toi van hanh vi ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tu ((nang xa) OR (nang x)) hoi. thieu nien cac toi van hanh vi ve triet".
• Adding a wildcard symbol may retrieve word variants: su sach tu ((nang xa) OR (nang x)) hoi. thieu nien cac toi van hanh vi ve triet*.