Perhaps you should try some spelling variations:
sach nganh » sach ngan, sach tranh, cac nganh
nganh xay » nganh mac, nganh y, nganh ma
xay thuat » my thuat, va thuat, cac thuat
nganh ky » nganh y, hanh ky, nganh co
toan hoc » van hoc, hoa hoc, tin hoc
su sach » so sach, vu sach
co sach » bo sach, cuon sach, hoc sach

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 nganh ky thuat toan khoa ) or ( co sach nganh xay thuat toan hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach nganh ky thuat toan khoa ) OR ( co sach nganh xay thuat toan hoc )).
• Adding a wildcard symbol may retrieve word variants: (( su sach nganh ky thuat toan khoa ) or ( co sach nganh xay thuat toan hoc ))*.