Perhaps you should try some spelling variations:
"phung thi dua van. con duong uoc mo" » "phung thi dua van. con huong uoc mo", "phung thi dua van. con duong hoc mo", "phung thi dua van. con duong nguoc mo", "phung thi dua van. van duong uoc mo", "phung thi dung van. con duong uoc mo", "phung thi duy van. con duong uoc mo", "phung thi dua vao. con duong uoc mo", "phung thi duc van. con duong uoc mo"
"dung tri luan van. hoat dong co mo" » "dung tai luan van. hoat dong co mo", "dung tren luan van. hoat dong co mo", "dung sai luan van. hoat dong co mo", "dung tri quan van. hoat dong co mo", "dung thi luan van. hoat dong co mo", "dung tri tuan van. hoat dong co mo", "dung tri luan van. hoat dong co mot", "dung tri luan van. hoat dong co so", "dung tri luan van. hoat dong co ma", "dung tri luan van. hoat cong co mo"

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: (("dung tri luan van. hoat dong co mo") OR ("phung thi dua van. con duong uoc mo"))~.
• Removing quotes may allow a broader search: (( dung tri luan van. hoat dong co mo ) or ( phung thi dua van. con duong uoc mo ))~.
• Adding a wildcard symbol may retrieve word variants: (("dung tri luan van. hoat dong co mo") or ("phung thi dua van. con duong uoc mo"))*.