Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung cu trien slippers" » "dung cu tren slippers", "dung cu tien slippers", "dung tu trien slippers", "dung cua trien slippers", "dung co trien slippers", "dung cho trien slippers", "dung cu trien slippery", "dung cu trien 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 cu trien 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 cu trien slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cu trien slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cu trien slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.