Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"cac khoa tin snippets" » "cac khoan tin snippets", "cac khoi tin snippets", "dac khoa tin snippets", "cac khoa tinh snippets", "cac hoa tin snippets", "cac khoa tieng snippets", "cac khoa tin 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: (((("cac khoa tin snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cac khoa tin snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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