Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa doi da snippets" » "hoa doi da snippets", "khoa hoi da snippets", "khoa noi da snippets", "khoa doi dau snippets", "khoa doi dam snippets", "khoa doi dan 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: (((("khoa doi da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa doi da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("khoa doi da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.