Perhaps you should try some spelling variations:
khan thong » khap thong, khau thong, nhan thong
thuoc bach » thuoc sach, thuoc ban, truc bach
bai thuoc » ban thuoc, bai hoc, cay thuoc
bach hoai » bach hoa, bach mai, bach khoa
thu thong » thuy thong, thu thang, thu tuong
thuc cach » thuoc sach, truoc cach, thuc hanh
hoai thu » doi thu
dao thuc » dan thuc, dao tuc, do thuc
cach kho » bach khoa, cach thoi, cach pha
kho khan » khoa kham, khoa than
tu lanh » tu hanh, tu lenh, tu manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu cac bai thuoc bach hoai thu thong ) or ( tu lanh dao thuc cach kho khan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cac bai thuoc bach hoai thu thong ) OR ( tu lanh dao thuc cach kho khan thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cac bai thuoc bach hoai thu thong ) or ( tu lanh dao thuc cach kho khan thong ))*.