Perhaps you should try some spelling variations:
"nhung phuong quan van. noi dung hoc moi" » "dung phuong quan van. noi dung hoc moi", "nhu phuong quan van. noi dung hoc moi", "truong phuong quan van. noi dung hoc moi", "nhung phuong quang van. noi dung hoc moi", "nhung phuong quynh van. noi dung hoc moi", "nhung thuong quang van. noi dung hoc moi", "nhung phuong quan va. noi dung hoc moi", "nhung phuong quan luan. noi dung hoc moi", "nhung phuong quan doan. noi dung hoc moi", "nhung phuong quan van. noi dong hoc moi", "nhung phuong quan van. noi dung thuoc moi", "nhung phuong quan van. noi trung hoc moi", "nhung phuong quan van. noi dung hoc noi"
"nhung loi luan van. hoc dung quoc mo" » "nhung bai luan van. hoc dung quoc mo", "nhung bi luan van. hoc dung quoc mo", "nhung gi luan van. hoc dung quoc mo", "nhung loi luan van. hoc dang quoc mo", "nhung loi luan van. hoc dong quoc mo", "nhung loi luan van. hoc trung quoc mo", "nhung li luan van. hoc dung quoc mo", "nhung hoi luan van. hoc dung quoc mo", "nhung loi lan van. hoc dung quoc mo", "nhung loi luan van. hoc ung quoc mo", "nhung loi luan van. hoc dan quoc mo", "nhung loi luan van. tac dung quoc mo", "nhung loi luan van. hoc dung uoc mo", "nhung loi luan van. hoc dung quoc co", "nhung loi luan van. hoc dung quoc lo"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("nhung phuong quan van. noi dung hoc moi") or ("nhung loi luan van. hoc dung quoc mo"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("nhung phuong quan van. noi dung hoc moi") OR ("nhung loi luan van. hoc dung quoc mo")).
• Removing quotes may allow a broader search: (( nhung phuong quan van. noi dung hoc moi ) or ( nhung loi luan van. hoc dung quoc mo )).
• Adding a wildcard symbol may retrieve word variants: (("nhung phuong quan van. noi dung hoc moi") or ("nhung loi luan van. hoc dung quoc mo"))*.