Perhaps you should try some spelling variations:
dan trinh » dan tinh, van trinh, hanh trinh
nganh xay » nganh mac, nganh y, nganh ma
xay huyet » cay huyet, xuat huyet, bam huyet
huyet hoa » thuyet hoa, huyet hoc, huyen hoa
thuat do » thuat o
toc sach » hoc sach, doc sach, thuoc sach
do hoa » dong hoa

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: (( cac dan trinh ky thuat do hoa ) OR ( ((te sach) OR (toc sach)) nganh xay huyet hoa hoc ))~.
• Adding a wildcard symbol may retrieve word variants: (( cac dan trinh ky thuat do hoa ) or ( ((te sach) or (toc sach)) nganh xay huyet hoa hoc ))*.