Perhaps you should try some spelling variations:
sanh nganh » anh ngan, dang nganh, sach ngan
sach tranh » canh tranh
sach danh » sach dao, sach dung, sach kinh
thuat do » thuat o
va thuat » ky thuat, ki thuat, va thuc
so sanh » do sanh
y thuat » ky thuat, my thuat, kxy thuat
do hoc » co hoc, do hoa, du 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: (( so sanh nganh y thuat do hoc ) OR ( so ((sach danh) OR (sach tranh)) va thuat do hoc ))~.
• Adding a wildcard symbol may retrieve word variants: (( so sanh nganh y thuat do hoc ) or ( so ((sach danh) or (sach tranh)) va thuat do hoc ))*.