Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung te dung slippers" » "dung he dung slippers", "dung de dung slippers", "dung le dung slippers", "dung tieu dung slippers", "dung tien dung slippers", "dung tin dung slippers", "dung te dung slippery", "dung te dung 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 te dung slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung te dung slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung te dung slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung te dung slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.