Perhaps you should try some spelling variations:
sach nganh » cac nganh, sach danh, cach nhanh
sach tranh » canh tranh
sach ngan » sach ngon, sach nha, sach han
tu sach » thu sach, su sach, te sach
y huyet » ly huyet, ly thuyet, cay huyet
hoc hoi » hoc khoi, hoc hoa, hoc noi
ngan y » nganh y, nhan y, nganh ky
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: (( thu ((sach nganh) OR (sach tranh)) ky thuat toan khoa ) or ( tu sach ngan y huyet hoc hoi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu ((sach nganh) OR (sach tranh)) ky thuat toan khoa ) OR ( tu sach ngan y huyet hoc hoi )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thu ((sach nganh) OR (sach tranh)) ky thuat toan khoa ) or ( tu sach ngan y huyet hoc hoi ))".
• Adding a wildcard symbol may retrieve word variants: (( thu ((sach nganh) OR (sach tranh)) ky thuat toan khoa ) or ( tu sach ngan y huyet hoc hoi ))*.