Perhaps you should try some spelling variations:
pham thuoc » pham thuc, phap thuoc, pham thuong
thuoc sinh » hoc sinh, thu sinh, thuoc sach
khau thong » khau thuong, khap thong, khau tong
hinh trong » chinh trong, dinh trong, sinh trong
trong thuc » trong thu, thuong thuc, trong thuat
sanh pham » san pham, thanh pham, khanh pham
sinh khoa » sinh hoc, sinh hoat
khoa khau » khoa kham, khoa phau, khoa chau
hoc thong » hoc thuong, hoc trong, hoc hong
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
khoa hoc » hoa hoc
so sanh » do sanh
su hinh » su chinh, su kinh, duc hinh

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 pham thuoc sinh khoa khau thong ) OR ( su hinh trong thuc anh khoa hoc thong ))~.
• Adding a wildcard symbol may retrieve word variants: (( so sanh pham thuoc sinh khoa khau thong ) or ( su hinh trong thuc anh khoa hoc thong ))*.