Perhaps you should try some spelling variations:
"thuc hanh trinh thiet duoc hoc" » "thuc hanh trinh viet duoc hoc", "thuc hanh trinh thi duoc hoc", "thuc canh tranh thiet duoc hoc", "thuc hanh chinh thiet duoc hoc", "thuc hanh trinh chet duoc hoc", "thuc hanh trinh hiem duoc hoc", "thuc hanh trinh thuat duoc hoc", "thuc hanh trinh thiet quoc hoi", "thu hanh trinh thiet duoc hoc"
"te sach kinh nhiem cua hoc" » "te sach kinh nghiem cua hoc", "te sach kinh hien cua hoc", "te sach binh khiem cua hoc", "te sach kinh nhiet cua hoc", "te sach kinh nhiem chuan hoc", "te sach kinh nghiep cua hoc", "toc sach kinh nhiem cua hoc", "te sach kinh nhiem cua hoi", "te sach kinh nhiem cua thuoc", "te sach kinh nhiem cua nuoc"

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: (("thuc hanh trinh thiet duoc hoc") or ("te sach kinh nhiem cua hoc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("thuc hanh trinh thiet duoc hoc") OR ("te sach kinh nhiem cua hoc")).
• Removing quotes may allow a broader search: (( thuc hanh trinh thiet duoc hoc ) or ( te sach kinh nhiem cua hoc )).
• Adding a wildcard symbol may retrieve word variants: (("thuc hanh trinh thiet duoc hoc") or ("te sach kinh nhiem cua hoc"))*.