Perhaps you should try some spelling variations:
tham thuoc » pham thuoc, tham thuc, nha thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
khau thong » khau thuong, khap thong, khau tong
khoa thong » hoa thong, thoai thong, pho thong
hanh khoa » hang khoa, anh khoa, hanh hoa
khoa khoa » hoa khoa, khuan khoa, khoa hoc
nha khau » nhap khau, nha kham, nha khach
sach dao » lanh dao
dao thuc » dan thuc, dao tuc, do thuc
te sach » toc sach
tu sach » thu sach, su sach, tu cach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach tham thuoc sach nha khau thong ) or ( tu sach dao thuc hanh khoa khoa thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tham thuoc sach nha khau thong ) OR ( tu sach dao thuc hanh khoa khoa thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tham thuoc sach nha khau thong ) or ( tu sach dao thuc hanh khoa khoa thong ))*.