Perhaps you should try some spelling variations:
doanh khoa » toan khoa
kham thong » khap thong, khau thong, pham thuong
thuc doanh » thuc hanh, thuc dan, chuc danh
thu doanh » thu oanh, tri doanh, thu hoach
khoa kham » kho khan, khoa than
sach tri » sach tai, sach tren, sach truc
tri thuc » tri tue
mai thu » mai thuy, ma thu, mai tu
su sach » so sach, vu sach
khoa he » hoa he, khoa hoc, khong he
bach » cach, bac

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 mai thu doanh khoa kham thong ) or ( su sach tri thuc doanh khoa he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu bach mai thu doanh khoa kham thong ) OR ( su sach tri thuc doanh khoa he thong )).
• Adding a wildcard symbol may retrieve word variants: (( vu bach mai thu doanh khoa kham thong ) or ( su sach tri thuc doanh khoa he thong ))*.