Perhaps you should try some spelling variations:
than thuong » thanh thuong, phan thuong, han thuong
phau thong » phap thong, khau thong, phan thong
ban thuoc » dang thuoc, cay thuoc, nam thuoc
thuoc ban » thuoc tan, thuoc dang, thu ban
khoa phau » hoa phan, khoa kham, khoa thu
thuat may » thuat xay, thuat gay, thuat bai
khoa than » khoa luan, hoa thai, hoa tan
sach ban » sach bai, sach han, sach bac
ban khoa » san khoa, van khoa, ba khoa
ki thuat » ky thuat
may khoa » da khoa, ly khoa, y khoa
so sach » so sanh, bo sach, co sach
tu sach » thu sach, su sach, te sach
sach ki » sach kinh, sach bai, sach kem

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 ban thuoc ban khoa phau thong ) or ( tu sach ki thuat may khoa than thuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach ban thuoc ban khoa phau thong ) OR ( tu sach ki thuat may khoa than thuong )).
• Adding a wildcard symbol may retrieve word variants: (( so sach ban thuoc ban khoa phau thong ) or ( tu sach ki thuat may khoa than thuong ))*.