Perhaps you should try some spelling variations:
"phan ngoc sio2 snippets" » "pham ngoc sio2 snippets", "tran ngoc sio2 snippets", "van ngoc sio2 snippets", "phan ngoc son snippets", "phan ngoc sio2 slippers"
"python using a snippets" » "python using a slippers"
"locating bug code snippets" » "locating bug code slippers", "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 ngoc sio2 snippets") or ("python using a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan ngoc sio2 snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("phan ngoc sio2 snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.