Perhaps you should try some spelling variations:
thuat doanh » thuat toan, luat doanh, thuat lanh
doanh khoa » toan khoa
pham thuoc » pham thuc, phap thuoc, pham thuong
phap thong » phap phong, phap chong, pho thong
hoc thong » hoc thuong, hoc trong, hoc hong
sach pham » sach tham, sach phat, sach phap
thuoc anh » thuoc thanh, thuoc dang, thuoc sach
khoa phap » khoa phau, khoan phai, khong phap
ki thuat » ky thuat
khoa hoc » hoa hoc
anh khoa » hang khoa
tu sach » thu sach, su sach, te sach
sach ki » sach kinh, sach bai, sach kem

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 ki thuat doanh khoa hoc thong ) or ( tu sach pham thuoc anh khoa phap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach ki thuat doanh khoa hoc thong ) OR ( tu sach pham thuoc anh khoa phap thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach ki thuat doanh khoa hoc thong ) or ( tu sach pham thuoc anh khoa phap thong ))*.