Perhaps you should try some spelling variations:
pham thuoc » pham thuc, phap thuoc, pham thuong
thuoc dang » thuoc dung, thuoc khang, thuc dan
dang khoa » dung khoa, hang khoa, dang khoi
hoc trong » hoc thuong, hoc tieng, dot trong
thuc bach » truc bach, thuc cach, thuoc sach
bach khoa » anh khoa
khoa khoi » khoa hoi, khoa khoa, thoat khoi
tac pham » thuc pham, san pham
khoa hoc » hoa hoc
te sach » toc sach
sach am » sach tham, sach dao, sach bai
tu tac » tu trac, tu tai, tu cac
khong » phong

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu tac pham thuoc dang khoa hoc trong ) or ( te sach am thuc bach khoa khoi (khong OR thong) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu tac pham thuoc dang khoa hoc trong ) OR ( te sach am thuc bach khoa khoi (khong OR thong) ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu tac pham thuoc dang khoa hoc trong ) or ( te sach am thuc bach khoa khoi (khong OR thong) ))*".