Perhaps you should try some spelling variations:
"using ibm code snippets" » "using rbf code snippets", "using lbm code snippets", "using ibm code slippers"
"dung pham nhan snippets" » "dung phan nhan snippets", "hung pham nhan snippets", "tung pham nhan snippets", "dung pham nhat snippets", "dung ham nhan snippets", "dung pham thanh snippets", "dung pham nhan 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 pham nhan snippets"))) or ("locating bug code snippets"))~.
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