Perhaps you should try some spelling variations:
tham thuoc » pham thuoc, tham thuc, nha thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
khan thong » khap thong, khau thong, nhan thong
phan tong » phan trong, phan cong, han tong
hoat phan » hoa phan, thuat phan, hoc phan
sach tham » sach nha
sach dao » lanh dao
dao thuc » dan thuc, dao tuc, do thuc
thuc cac » thuc cach, tuc cac, phuc cac
cac hoat » cao hoat, cac khoan, cac thuat
sach kho » bach khoa, sach nha, sach kem
kho khan » khoa kham, khoa than
tu sach » thu sach, su sach, te sach

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 dao thuc cac hoat phan tong ) or ( tu sach tham thuoc sach kho khan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach dao thuc cac hoat phan tong ) OR ( tu sach tham thuoc sach kho khan thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach dao thuc cac hoat phan tong ) or ( tu sach tham thuoc sach kho khan thong ))*.