Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
thuc cach » thuoc sach, truoc cach, thuc hanh
cach hoat » cac hoat, cach hoan, tich hoat
bach tham » sach tham, bac thay, bach ha
sach khoa » bach khoa, sach nha, anh khoa
khoa kham » kho khan, khoa than
bach dao » sach dao, bach dan, bach mao
dao thuc » dan thuc, dao tuc, do thuc
hoat han » hoat hang, thoat han, hoa han
tham hoc » thai hoc, tham hoa, than hoc
hoc sach » hoc sinh, hoc cac, hoc anh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( vu bach dao thuc cach hoat han tong ) or ( vu bach tham hoc sach khoa kham thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu bach dao thuc cach hoat han tong ) OR ( vu bach tham hoc sach khoa kham thong )).
• Adding a wildcard symbol may retrieve word variants: (( vu bach dao thuc cach hoat han tong ) or ( vu bach tham hoc sach khoa kham thong ))*.