Perhaps you should try some spelling variations:
thieu nien » thien nhien
thanh tai » thanh hai, thanh toan, doanh tai
nien cac » vien cac, dien cac, bien cac
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
sach ty » sach tu, sach thu, xach tay
nang xa » nang x, lang xa, nang ma

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 ty) OR (sach y)) nang xa hoi. thieu nien cac nuoc va thanh tai ((su triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) nang xa hoi. thieu nien cac nuoc va thanh tai ((su triet) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach y)) nang xa hoi. thieu nien cac nuoc va thanh tai ((su triet) or (va thiet))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach y)) nang xa hoi. thieu nien cac nuoc va thanh tai ((su triet) or (va thiet))*.