Perhaps you should try some spelling variations:
"thuc khoa may snippets" » "hoc khoa may snippets", "chua khoa may snippets", "thuc ha may snippets", "thuc khoa ma snippets", "thuc hoa may snippets", "thuc nha may snippets", "thuc khoa may slippers"
"python using raw snippets" » "python using real snippets", "python using a snippets", "python using low snippets", "python using raw 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.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("thuc khoa may snippets") or ("python using raw snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thuc khoa may snippets") OR ("python using raw snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thuc khoa may snippets ) or ( python using raw snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thuc khoa may snippets") or ("python using raw snippets"))) or ("locating bug code snippets"))*.