Perhaps you should try some spelling variations:
phap thuoc » phap thuc, pham thuoc, phap truoc
thuoc sach » hoc sach, nuoc sach, thuat sach
sach phap » sach phat, sach nha, cach pha
sach khoa » bach khoa, sach nha, anh khoa
pho thong » he thong
sach tham » sach nha
tham thuc » nham thuc, pham thuc, tam thuc
thuc hang » thuc hanh, thu hang, phuc hang
hang khoa » dung khoa
phu thong » phap thong, khau thong, phan thong
khoa pho » khoa khoa, khoa phau, khoa hoc
khoa phu » khoa phau, khoa thu, hoa phu
so sach » so sanh, bo sach, co sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sach phap thuoc sach khoa pho thong ) or ( so sach tham thuc hang khoa phu thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach phap thuoc sach khoa pho thong ) OR ( so sach tham thuc hang khoa phu thong )).
• Adding a wildcard symbol may retrieve word variants: (( so sach phap thuoc sach khoa pho thong ) or ( so sach tham thuc hang khoa phu thong ))*.