Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thuoc dung » hoc dung, thuy dung
phan tong » phan trong, phan cong, han tong
tai thuoc » tri thuoc, bai thuoc, tac thuoc
dung khoa » dung cho
phu thong » pho thong, phap thong, khau thong
va thuoc » va thuc, va thuong, nha thuoc
thu sach » thuat sach, thu hoach, khau sach
sach tai » sach bai, sach tham, sach dao
khoa phu » khoa phau, khoa thu, hoa phu
tu sach » su sach, te sach, tu cach
sach va » sach xa, sach ha, sach dao
sach co » sach lo, sach dao, sach cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach va thuoc sach co phan tong ) or ( thu sach tai thuoc dung khoa phu thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach va thuoc sach co phan tong ) OR ( thu sach tai thuoc dung khoa phu thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach va thuoc sach co phan tong ) or ( thu sach tai thuoc dung khoa phu thong ))*.