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

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