Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung thu duc slippers" » "ung thu duc slippers", "dung phu duc slippers", "dung thi duc slippers", "dung thu tuc slippers", "dung tho duc slippers", "dung thu muc slippers", "dung thu duc slippery", "dung thu duc grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung java java snippets") or ("dung thu duc slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dung thu duc slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dung thu duc slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dung thu duc slippers"))) or ("locating bug code snippets"))*.