Perhaps you should try some spelling variations:
"using ibm code snippets" » "using rbf code snippets", "using lbm code snippets", "using ibm code slippers"
"dung sai luan snippets" » "dung tai luan snippets", "dung va luan snippets", "dung dat luan snippets", "dung bai luan snippets", "dung dai luan snippets", "dung san luan snippets", "dung sai luan 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 sai luan 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 sai luan snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("using ibm code snippets") or ("dung sai luan snippets"))) or ("locating bug code snippets"))*.