Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"dung dan huyen snippets" » "dung ban huyen snippets", "dung gian huyen snippets", "dung tai huyen snippets", "dung dat huyen snippets", "dung san huyen snippets", "tung dan huyen snippets", "dung dan huyen slippers"
"locating bug code snippets" » "locating bug code slippers", "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 dan huyen snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dung dan huyen snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dung dan huyen snippets"))) or ("locating bug code snippets"))*.