Perhaps you should try some spelling variations:
sach tranh » canh tranh
sach nganh » sach ngan, cac nganh, sach danh
tranh xay » trinh xay, trong xay, manh xay
xay thuat » my thuat, va thuat, cac thuat
thuat hoa » thuyet hoa, thuat do, thuat o
nganh ky » nganh y, nganh xay, hanh ky
toan hoc » toan khoa, van hoc, tin hoc
tu sach » thu sach, su sach, te sach

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