Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cam khe toan snippets" » "cam ke toan snippets", "cam khi toan snippets", "cam kiem toan snippets", "chap khe toan snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("cam khe toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cam khe toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("cam khe toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.