Perhaps you should try some spelling variations:
khau thong » khau thuong, khap thong, khau tong
phau thong » phap thong, phan thong, phan 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
khoa phau » hoa phan, khoa kham, khoa than
cach toc » cac toc, cach hoc, cach thoi
toc khau » toc thai, toc cham, moc chau
thuc tue » thuc te, thuc que, thuc tre
tue cach » ve cach, cuu cach, tap cach
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 toc khau thong ) or ( tu cach thuc tue cach khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach thuc thuc cach toc khau thong ) OR ( tu cach thuc tue cach khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach thuc thuc cach toc khau thong ) or ( tu cach thuc tue cach khoa phau thong ))*.