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
thu sach » tu sach, thuat sach, thuoc sach
toan hoc » van hoc, hoa hoc, tin hoc
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: (( thu 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: (( thu sach ngan ky thuat toan khoa ) OR ( tu canh tranh xay thuat toan hoc )).
• Adding a wildcard symbol may retrieve word variants: (( thu sach ngan ky thuat toan khoa ) or ( tu canh tranh xay thuat toan hoc ))*.