Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
cach thuc » anh thuc, cac thu
thuc thuc » hoc thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, cac khoan
phu thong » pho thong, phap thong, khau thong
thuc cung » thuc chung, thuc dung, thuc vung
cung cach » chung cach, cung cac, cung cap
khoa kham » kho khan, khoa than
khoa phu » khoa phau, khoa thu, hoa phu
tu cach » tu cac

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 thuc cach khoa phu thong ) or ( tu cach thuc cung cach khoa kham thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach thuc thuc cach khoa phu thong ) OR ( tu cach thuc cung cach khoa kham thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach thuc thuc cach khoa phu thong ) or ( tu cach thuc cung cach khoa kham thong ))*.