Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"khoa tap ii snippets" » "khoa tai ii snippets", "khoa than ii snippets", "hoc tap ii snippets", "khoa tap di snippets", "khoa tap ki snippets", "khoa tap giai snippets", "khoa tap ii 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: (((("khoa tap ii snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa tap ii snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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