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

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