Perhaps you should try some spelling variations:
"nhung thoi luan van. hoat dong hoc moinit" » "nhung thi luan van. hoat dong hoc moinit", "phung thi luan van. hoat dong hoc moinit", "nhung loi luan van. hoat dong hoc moinit", "nhung hoi luan van. hoat dong hoc moinit", "nhung thai luan van. hoat dong hoc moinit", "nhung thoi luan van. hoat dong co moinit", "nhung thoi luan van. hoat dong luc moinit", "nhung thoi luan van. hoat dong hoc moiinit", "nhung thoi luan van. hoat dong hoc motinit", "nhung thoi luan van. hoat dong hoc moninit"
"nhung bai que van. moi trung hoc mo" » "nhung bai que van. moi truong hoc mo", "nhung bai que van. doi trung hoc mo", "nhung bai que van. hoi trung hoc mo", "nhung bai que van. moi trung quoc mo", "nhung bai qua van. moi trung hoc mo", "nhung bai quy van. moi trung hoc mo", "nhung bai quyet van. moi trung hoc mo", "nhung bai que van. moi trung hoc moi", "nhung bai que van. moi trung hoc mot", "nhung bai que van. moi trung hoc mon"

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: (("nhung thoi luan van. hoat dong hoc moinit") or ("nhung bai que van. moi trung hoc mo"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("nhung thoi luan van. hoat dong hoc moinit") OR ("nhung bai que van. moi trung hoc mo")).
• Removing quotes may allow a broader search: (( nhung thoi luan van. hoat dong hoc moinit ) or ( nhung bai que van. moi trung hoc mo )).
• Adding a wildcard symbol may retrieve word variants: (("nhung thoi luan van. hoat dong hoc moinit") or ("nhung bai que van. moi trung hoc mo"))*.