Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"luan hat sac snippets" » "luan chat sac snippets", "luan hoat sac snippets", "luan han sac snippets", "luan mat sach snippets", "luan dat sach snippets", "luan ham sach snippets", "luan hat sac 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 hat sac 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 hat sac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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