Perhaps you should try some spelling variations:
"nhung thoi luan van. con dong co mo" » "phung thi luan van. con dong co mo", "nhung loi luan van. con dong co mo", "nhung tri luan van. con dong co mo", "nhung hoi luan van. con dong co mo", "nhung thi luan van. con dong co mo", "nhung thai luan van. con dong co mo", "nhung thoi luan van. cong dong co mo", "nhung thoi luan van. con duong co mo", "nhung thoi luan van. co dong co mo", "nhung thoi luan van. con dong co mot", "nhung thoi luan van. con dong co so", "nhung thoi luan van. con dong co ma"
"nhung thi quyet van. boi duong loi mo" » "phung thi quyet van. boi duong loi mo", "nhung tri quyet van. boi duong loi mo", "nhung chi quyet van. boi duong loi mo", "nhung thi tuyet van. boi duong loi mo", "nhung toi quyet van. boi duong loi mo", "nhung theo quyet van. boi duong loi mo", "nhung thi quyet van. hai duong loi mo", "nhung thi quyet van. doi tuong loi mo", "nhung thi quyet van. con duong loi mo", "nhung thi quyet van. boi duong co mo", "nhung thi quyet van. boi duong thi mo", "nhung thi quyet van. boi duong loi mon", "nhung thi quyet van. boi duong doi mo", "nhung thi quyet van. boi duong lo mo"

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. con dong co mo") or ("nhung thi quyet van. boi duong loi mo"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("nhung thoi luan van. con dong co mo") OR ("nhung thi quyet van. boi duong loi mo")).
• Removing quotes may allow a broader search: (( nhung thoi luan van. con dong co mo ) or ( nhung thi quyet van. boi duong loi mo )).
• Adding a wildcard symbol may retrieve word variants: (("nhung thoi luan van. con dong co mo") or ("nhung thi quyet van. boi duong loi mo"))*.