Perhaps you should try some spelling variations:
cach khoan » cac khoan, cach hoan, bach khoa
phau thong » phap thong, khau thong, phan thong
hoi thuong » hoai thuong, hoc thuong, boi thuong
khoa phau » hoa phan, khoa kham, khoa than
cach thuc » anh thuc, cac thu
thuc thuc » hoc thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
khoan hoi » khoan nhoi, khoa hoi, khoa hoc
bai thuc » bai thuoc, bao thuc, dai thuc
thuc cac » tuc cac, phuc cac, thac cac
cac khoa » cac khoan, cac khoi, dac khoa
so cach » so sach, co cach, loi cach
su cac » tu cac, su cao, su can

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su cac bai thuc cac khoa phau thong ) or ( so cach thuc thuc cach khoan hoi thuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su cac bai thuc cac khoa phau thong ) OR ( so cach thuc thuc cach khoan hoi thuong )).
• Adding a wildcard symbol may retrieve word variants: (( su cac bai thuc cac khoa phau thong ) or ( so cach thuc thuc cach khoan hoi thuong ))*.