Perhaps you should try some spelling variations:
thuc doanh » thuc hanh, thuc dan, chuc danh
doanh khoa » toan khoa
phap thong » phap phong, phap chong, pho thong
sach truc » cach thuc, sach tren, sach thu
khoa phap » khoa phau, khoan phai, khong phap
sach tri » sach tai, sach tren, sach doi
sach bai » sach dao, cac bai, sach xa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach tri) OR (sach bai))) OR (sach truc)) thuc doanh khoa phap thong~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((((sach tri) OR (sach bai))) or (sach truc)) thuc doanh khoa phap thong~".
• Adding a wildcard symbol may retrieve word variants: tu ((((sach tri) OR (sach bai))) or (sach truc)) thuc doanh khoa phap thong*.