Perhaps you should try some spelling variations:
phap thong » phap phong, phap chong, pho thong
doanh khoa » toan khoa
khoa phap » khoa phau, khoan phai, khong phap
hang khoa » dung khoa
sach tai » sach bai, sach tham, sach dao
te doanh » te danh, de doanh, ty doanh
sanh thu » sach thu, san thu, doanh thu
tuc hang » tuc tang, tuc hanh, thuc hanh
tu sach » thu sach, su sach, te sach
so sanh » do sanh
khoa he » hoa he, khoa hoc, khong he
tai te » tai tu, tai he, tai le

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach tai te doanh khoa phap thong ) or ( so sanh thu tuc hang khoa he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tai te doanh khoa phap thong ) OR ( so sanh thu tuc hang khoa he thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tai te doanh khoa phap thong ) or ( so sanh thu tuc hang khoa he thong ))*.