Perhaps you should try some spelling variations:
sach cho » sach che, danh cho, sach dao
cho mang » cho hang, cho lang, cho nang
hieu dan » hieu van, sieu dan, hieu dac
gian duc » giao duc, gia duc, gian dac
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
mang xa » lang xa, mang may, dang xay
va hanh » van hanh, va danh, ban hanh
thai va » thai van
hai va » hai van, hoi va, mai va
thiet » thieu

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 cho mang xa hoi. hieu dan gian duc ((va hanh) or (va thanh)) ((hai va) OR (thai va)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach cho mang xa hoi. hieu dan gian duc ((va hanh) OR (va thanh)) ((hai va) OR (thai va)) thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach cho mang xa hoi. hieu dan gian duc ((va hanh) or (va thanh)) ((hai va) OR (thai va)) thiet".
• Adding a wildcard symbol may retrieve word variants: su sach cho mang xa hoi. hieu dan gian duc ((va hanh) or (va thanh)) ((hai va) OR (thai va)) thiet*.