Perhaps you should try some spelling variations:
"using ibm code snippets" » "using rbf code snippets", "using lbm code snippets", "using ibm code slippers"
"dung den lang snippets" » "dung dien lang snippets", "dung de lang snippets", "dung dan lang snippets", "dung den nang snippets", "dung den bang snippets", "dung ten lang snippets", "dung den lang slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("using ibm code snippets") or ("dung den lang snippets"))) or ("locating bug code snippets"))~.
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