Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
cach thuc » anh thuc, cac thu
thuc tiep » thuc tien, truc tiep, thuc hien
dan thong » dan trong, ban thong, dan phong
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, cac khoan
khoa phau » hoa phan, khoa kham, khoa than
sach thu » sach thue, sach thieu, sach tham
thu thuc » thuc thuc, thu thuoc, thue thuc
tu cach » tu cac
can hoa » van hoa, cau hoa, cam hoa
tu sach » thu sach, su sach, te 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 tiep can hoa dan thong ) or ( tu sach thu thuc cach khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach thuc tiep can hoa dan thong ) OR ( tu sach thu thuc cach khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach thuc tiep can hoa dan thong ) or ( tu sach thu thuc cach khoa phau thong ))*.