Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"hat toi pham snippets" » "hat tac pham snippets", "hat vi pham snippets", "hat thi phap snippets", "hat doi pham snippets", "hat tai pham snippets", "mat troi pham snippets", "hat toi pham 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: (((("hat toi pham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hat toi pham snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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