Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra cau quan slippers" » "tra cau qua slippers", "tra cao quan slippers", "tra ca quan slippers", "tra sau quan slippers", "ta cau quan slippers", "tra cuu quan slippers", "tra cau quan slippery", "tra cau quan grippers"
"locating bug code snippets" » "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: (((("tra cau quan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tra cau quan slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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