Perhaps you should try some spelling variations:
thuc doanh » thuc hanh, thuc dan, chuc danh
phap thong » phap phong, phap chong, pho thong
doanh khoa » toan khoa
sach truc » cach thuc, sach tren, sach thu
cach khoa » bach khoa, cac khoa, cac khoan
khoa phap » khoa phau, khoan phai, khong phap
truc thuc » truc thuoc, thuc thuc, truc thuy
truc tue » truc tu, truc tuyen, truc tiep
tue cach » tu cach, thuc cach, ve cach
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach truc tue cach khoa phap thong ) or ( su sach truc thuc doanh khoa phap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach truc tue cach khoa phap thong ) OR ( su sach truc thuc doanh khoa phap thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach truc tue cach khoa phap thong ) or ( su sach truc thuc doanh khoa phap thong ))*.