Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung qua hap slippers" » "duong qua hap slippers", "dung quan hap slippers", "dung cua hap slippers", "dung qua hai slippers", "dung qua ap slippers", "dung quan phap slippers", "dung qua hap slippery", "dung qua hap 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 qua hap 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 qua hap slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung qua hap slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung qua hap slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.