Perhaps you should try some spelling variations:
sach tranh » canh tranh
sach ngan » sach ngon, sach nha, sach han
tranh xay » trinh xay, trong xay, manh xay
xay thuat » my thuat, va thuat, cac thuat
toan hoc » toan khoa, van hoc, hoa hoc
tu sach » thu sach, su sach, te sach
ngan ky » nganh ky, nhan ky, ngan hay

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