Perhaps you should try some spelling variations:
"thu thanh sio2 snippets" » "thu thanh son snippets", "thu thang sio2 snippets", "tu thanh sio2 snippets", "thuan thanh sio2 snippets", "thu thanh 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: (((("thu thanh 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: (((("thu thanh sio2 snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("thu thanh sio2 snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.