Perhaps you should try some spelling variations:
"su sach dao thuc doanh khoa pho thong" » "su sach dao thuc dan khoa pho thong", "su sach dao chuc danh khoa pho thong", "su sach dao muc doanh khoa pho thong", "su sach dao thuc toan khoa pho thong", "su sach dao thuc doanh khoa he thong", "su lanh dao thuc doanh khoa pho thong", "su sach dan thuc doanh khoa pho thong", "su sach dao tuc doanh khoa pho thong", "su sach do thuc doanh khoa pho thong", "su sach dao thuc doanh khoa phu thong", "su sach dao thuc doanh khoa khoa thong", "su sach dao thuc doanh khoa phau thong", "so sach dao thuc doanh khoa pho thong", "vu sach dao thuc doanh khoa pho thong"
"te sach bai thuc hanh khoa kham thong" » "te sach bai thuc hanh khoa khap thong", "te sach bai thuc hanh khoa khau thong", "te sach bai thuc hanh khoa pham thuong", "te sach bai thuc hang khoa kham thong", "te sach bai thuc anh khoa kham thong", "te sach bai thuc hanh hoa kham thong", "te sach bai thuc hanh kho khan thong", "te sach bai thuc hanh khoa than thong", "te cac bai thuc hanh khoa kham thong", "te sach xa thuc hanh khoa kham thong", "te sach bai thuoc hanh khoa kham thong", "te sach bao thuc hanh khoa kham thong", "te sach dai thuc hanh khoa kham thong", "toc sach bai thuc hanh khoa kham thong"

Try widening your search to All Fields.

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 dao thuc doanh khoa pho thong") or ("te sach bai thuc hanh khoa kham thong"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("su sach dao thuc doanh khoa pho thong") OR ("te sach bai thuc hanh khoa kham thong")).
• Removing quotes may allow a broader search: (( su sach dao thuc doanh khoa pho thong ) or ( te sach bai thuc hanh khoa kham thong )).
• Adding a wildcard symbol may retrieve word variants: (("su sach dao thuc doanh khoa pho thong") or ("te sach bai thuc hanh khoa kham thong"))*.