Perhaps you should try some spelling variations:
sach hanh » sach danh, sac hanh, sach tranh
sach minh » sach kinh, sach danh, sac tinh
sach han » sach tham, sach danh, sach nang
ky huyet » ly huyet, ly thuyet, cay huyet
thuat o » thuat do
tu sach » thu sach, su sach, te sach
minh ky » kinh ky, minh ly, trinh ky
hoc hoc » hoc hoa, toc hoc, hoc hoi
o hoc » co hoc, mo hoc, so hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thuoc ((sach hanh) OR (sach han)) ky thuat o hoc ) or ( tu sach minh ky huyet hoc hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuoc ((sach hanh) OR (sach han)) ky thuat o hoc ) OR ( tu sach minh ky huyet hoc hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thuoc ((sach hanh) OR (sach han)) ky thuat o hoc ) or ( tu sach minh ky huyet hoc hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( thuoc ((sach hanh) OR (sach han)) ky thuat o hoc ) or ( tu sach minh ky huyet hoc hoc ))*.