Perhaps you should try some spelling variations:
phap thong » phap phong, phap chong, pho thong
khap thong » khau thong, khac thuong, chap thuong
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, cac khoan
khoa khap » khoa kham, khoa khac, kho khan
dien thuc » kien thuc, den thuc, diem thuc
bai thuc » bai thuoc, bao thuc, dai thuc
thuc cac » tuc cac, phuc cac, thac cac
han phap » hanh phap, phan phap, ban phap
tu mach » tu cach, tu manh, tu hach
cac han » cac nhan, cac phan, cac dan

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 thuc cach khoa khap thong ) or ( tu mach dien thuc cac han phap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cac bai thuc cach khoa khap thong ) OR ( tu mach dien thuc cac han phap thong ))*.