Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan minh o2 snippets" » "pham minh o2 snippets", "phan dinh o2 snippets", "phan kinh o2 snippets", "phan minh hoa snippets", "phan minh son snippets", "phan minh hon 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: (((("phan minh o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan minh o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("phan minh o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.