Perhaps you should try some spelling variations:
"nhat nheo sio2 snippets" » "nhat theo sio2 snippets", "nhan nho sio2 snippets", "hat cheo sio2 snippets", "nhat nheo 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: (((("nhat nheo 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: (((("nhat nheo sio2 snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("nhat nheo sio2 snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.