Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"khoa tinh va snippets" » "hoa tinh va snippets", "khoa hinh va snippets", "khoa sinh va snippets", "khoa tich va snippets", "khoa trinh van snippets", "khoa trinh vat snippets", "khoa tinh va 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: (((("khoa tinh va snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa tinh va snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa tinh va snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa tinh va snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.