Perhaps you should try some spelling variations:
"using ibm code snippets" » "using rbf code snippets", "using lbm code snippets", "using ibm code slippers"
"dung qua nhap snippets" » "duong qua nhap snippets", "dung quan nhap snippets", "dung cua nhap snippets", "dung qua nhat snippets", "dung xuat nhap snippets", "dung quan phap snippets", "dung qua nhap 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 qua nhap snippets"))) or ("locating bug code snippets"))~.
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• Adding a wildcard symbol may retrieve word variants: (((("using ibm code snippets") or ("dung qua nhap snippets"))) or ("locating bug code snippets"))*.