Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"khoe cua lam snippets" » "kho cua lam snippets", "khoa cua lam snippets", "khoi cua lam snippets", "khoe cua tam snippets", "khoe cua nam snippets", "khoe cua am snippets", "khoe cua lam 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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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoe cua lam snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("khoe cua lam snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.