Perhaps you should try some spelling variations:
khau thong » khau thuong, khau tong, khac thuong
thuc thuoc » thuc thuc, truc thuoc, thu thuoc
thuoc sinh » hoc sinh, thu sinh, thuoc sach
khap thong » phap thong, khac thuong, chap thuong
cach thuc » anh thuc, cac thu
thuoc anh » thuoc thanh, thuoc dang, thuoc sach
khoa khau » khoa kham, khoa phau, khoa chau
bai thuoc » ban thuoc, bai hoc, cay thuoc
anh khoa » doanh khoa, hang khoa
sach bai » sach dao, cac bai, sach xa
hoc khap » hoc phap, hoc khac, hoc kham
tu cach » tu cac
su sach » so sach, vu 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 cach thuc thuoc anh khoa khau thong ) or ( su sach bai thuoc sinh hoc khap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach thuc thuoc anh khoa khau thong ) OR ( su sach bai thuoc sinh hoc khap thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach thuc thuoc anh khoa khau thong ) or ( su sach bai thuoc sinh hoc khap thong ))*.