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

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