Perhaps you should try some spelling variations:
sach nganh » sach ngan, sach tranh, cac nganh
kem thuat » kiem thuat, ky thuat, ki thuat
sach hanh » sach danh, sac hanh, sach tranh
sach han » sach tham, sach danh, sach nang
thuat do » thuat o
te sach » toc sach
y huyet » ly huyet, ly thuyet, cay huyet
hoc hoc » hoc hoa, toc hoc, hoc hoi
do hoc » co hoc, do hoa, du hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( toc ((sach hanh) or (sach han)) kem thuat do hoc ) or ( te sach nganh y huyet hoc hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( toc ((sach hanh) OR (sach han)) kem thuat do hoc ) OR ( te sach nganh y huyet hoc hoc )).
• Adding a wildcard symbol may retrieve word variants: (( toc ((sach hanh) or (sach han)) kem thuat do hoc ) or ( te sach nganh y huyet hoc hoc ))*.