Perhaps you should try some spelling variations:
"dung trinh luan slippers" » "dung tinh luan slippers", "dong trinh luan slippers", "cong trinh luan slippers", "dung trinh luat slippers", "dung trinh quan slippers", "dung trinh han slippers", "dung trinh luan slippery", "dung trinh luan grippers"
"dung vbug code snippets" » "dung vung code snippets", "dung vbung code snippets", "dung vbugs code snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

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: (((("dung vbug code snippets") or ("dung trinh luan slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung vbug code snippets") OR ("dung trinh luan slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung vbug code snippets ) or ( dung trinh luan slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung vbug code snippets") or ("dung trinh luan slippers"))) or ("locating bug code snippets"))*.