Perhaps you should try some spelling variations:
"using masked code snippets" » "using waste code snippets", "using based code snippets", "using market codes snippets", "using masked code slippers"
"dung a data snippets" » "dung va data snippets", "dung ha data snippets", "dung ai data snippets", "dung _ data snippets", "dung a data 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 masked code snippets") or ("dung a data snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using masked code snippets") OR ("dung a data snippets"))) OR ("locating bug code snippets")).
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