Perhaps you should try some spelling variations:
pham thuoc » pham thuc, phap thuoc, pham thuong
doanh khoa » toan khoa
thuoc sach » hoc sach, nuoc sach, thuat sach
sach pham » sach tham, sach phat, sach phap
sach khoa » bach khoa, sach nha, anh khoa
phu thong » pho thong, phap thong, khau thong
khoa hoc » hoa hoc
khoa phu » khoa phau, khoa thu, hoa phu
te sach » toc sach
sach ki » sach kinh, sach bai, sach kem
ki luat » ki thuat, hoi luat

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach ki luat doanh khoa hoc thuong ) or ( te sach pham thuoc sach khoa phu thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach ki luat doanh khoa hoc thuong ) OR ( te sach pham thuoc sach khoa phu thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach ki luat doanh khoa hoc thuong ) or ( te sach pham thuoc sach khoa phu thong ))*.