Perhaps you should try some spelling variations:
"thu hoach trinh nghien dan hoc" » "thu hoach trinh nghe dan hoc", "thu hoach kinh nghiem dan hoc", "thu hoach trinh thiet dan hoc", "thu hanh trinh nghien dan hoc", "thu hoach dinh nghien dan hoc", "thu hoach trong nghien dan hoc", "thu hoach trinh nghiep dan hoc", "thu hoach trinh nghia dan hoc", "thu hoach trinh nghien van hoc", "thu hoach trinh nghien dan toc", "thu hoach trinh nghien dai hoc"
"su sach trach nhiem su hoc" » "su sach trac nghiem su hoc", "su sach tranh nhiem su hoc", "su sach truc nhiem su hoc", "su sat trach nhiem su hoc", "su sach trach nghiem su hoc", "su sach trach nhiem huu hoc", "su sach trach nghiem xu hoc", "so sach trach nhiem su hoc", "vu sach trach nhiem su hoc", "su sach trach nhiem tu hoc", "su sach trach nhiem du hoc", "su sach trach nhiem so hoc"

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 trach nhiem su hoc") or ("thu hoach trinh nghien dan hoc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("su sach trach nhiem su hoc") OR ("thu hoach trinh nghien dan hoc"))*.
• Removing quotes may allow a broader search: (( su sach trach nhiem su hoc ) or ( thu hoach trinh nghien dan hoc ))*.