Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"khoi cuu ung snippets" » "khoi cua ung snippets", "hoi chu ung snippets", "hoi cua ung snippets", "khoi cuu cong snippets", "khoi huu tung snippets", "khoi cuu nang snippets", "khoi cuu ung 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: (((("khoi cuu ung snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoi cuu ung snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("khoi cuu ung snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.