Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"luan ban anh snippets" » "luan van anh snippets", "luan san anh snippets", "luan han anh snippets", "luan ban hanh snippets", "luan ban banh snippets", "luan ban danh snippets", "luan ban anh 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: (((("luan ban anh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan ban anh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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