Perhaps you should try some spelling variations:
phai thong » phap thong, phai tuong, phan thong
phap chong » phap phong, phap cong, pham hong
khoa phap » khoa phau, khoan phai, khong phap
khoa phai » khoan phai, khoa phau, khong phai
sach sat » sach dat, sach san, sach phat
sat thuc » am thuc, va thuc, dan thuc
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
sanh dai » sinh dai, sanh dan, vanh dai
dai truc » dai thuc, doan truc, dai trung
su sach » so sach, vu sach
so sanh » do sanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach sat thuc anh khoa phap chong ) or ( so sanh dai truc bach khoa phai thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach sat thuc anh khoa phap chong ) OR ( so sanh dai truc bach khoa phai thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach sat thuc anh khoa phap chong ) or ( so sanh dai truc bach khoa phai thong ))*.