Perhaps you should try some spelling variations:
sach nganh » sach ngan, sach tranh, cac nganh
nganh xay » nganh mac, nganh y, nganh ma
xay huyet » cay huyet, xuat huyet, bam huyet
tranh ky » trinh ky, thanh ky, nganh ky
thuat co » thuat do, thuat o
huyet va » thuyet va, quyet van, huyen van
te sach » toc sach
hanh ky » hanh kem
va hoc » van hoc

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach ((tranh ky) OR (hanh ky)) thuat co hoc ) OR ( te sach nganh xay huyet va hoc ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( te sach ((tranh ky) OR (hanh ky)) thuat co hoc ) or ( te sach nganh xay huyet va hoc ))~".
• Adding a wildcard symbol may retrieve word variants: (( te sach ((tranh ky) OR (hanh ky)) thuat co hoc ) or ( te sach nganh xay huyet va hoc ))*.