Perhaps you should try some spelling variations:
tham thuoc » pham thuoc, tham thuc, nha thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
khoan phan » khoan phai, khoan thanh, hoa phan
phan trong » pham trong, nhan trong, phan tong
sach tham » sach nha
sach khoa » bach khoa, sach nha, anh khoa
phu thong » pho thong, phap thong, khau thong
khoa phu » khoa phau, khoa thu, hoa phu
sach tri » sach tai, sach tren, sach truc
so sach » so sanh, bo sach, co sach
tri tho » tri nho, thi tho, tri thuoc
tho cac » cho cac, tho ca, thong cac

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 tham thuoc sach khoa phu thong ) or ( so sach tri tho cac khoan phan trong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach tham thuoc sach khoa phu thong ) OR ( so sach tri tho cac khoan phan trong )).
• Adding a wildcard symbol may retrieve word variants: (( so sach tham thuoc sach khoa phu thong ) or ( so sach tri tho cac khoan phan trong ))*.