Perhaps you should try some spelling variations:
toan thiet » hoan thien, luan thiet, toan tien
thuc cach » thuoc sach, truoc cach, thuc hanh
thiet yeu » thiet ke, theo yeu
sach minh » sach kinh, sach danh, sac tinh
minh bieu » minh hieu, minh kieu, tinh bieu
cua thuoc » nha thuoc, cay thuoc, cua nuoc
thuc can » thuc chan, thuc dan, thuc van
bieu cua » dieu cua, hieu cua, ben cua
yeu hoc » yeu hoi, lieu hoc, yeu nuoc
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((thuc can) or (thuc cach)) toan thiet yeu hoc ) or ( te sach minh bieu cua thuoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((thuc can) OR (thuc cach)) toan thiet yeu hoc ) OR ( te sach minh bieu cua thuoc )).
• Adding a wildcard symbol may retrieve word variants: (( ((thuc can) or (thuc cach)) toan thiet yeu hoc ) or ( te sach minh bieu cua thuoc ))*.