Perhaps you should try some spelling variations:
"using ibm code snippets" » "using rbf code snippets", "using lbm code snippets", "using ibm code slippers"
"dung thu dieu snippets" » "ung thu dieu snippets", "dung phu dieu snippets", "dung thi dieu snippets", "dung thuat dieu snippets", "dung thu hien snippets", "dung he dieu snippets", "dung thu dieu 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 thu dieu snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using ibm code snippets") OR ("dung thu dieu snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("using ibm code snippets") or ("dung thu dieu snippets"))) or ("locating bug code snippets"))*.