Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"khoi dau tao snippets" » "khoan dau tao snippets", "hoi dap tao snippets", "hoi dan tao snippets", "khoi dao tao snippets", "khoi cau tao snippets", "khoi da tao snippets", "khoi dau tao 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: (((("khoi dau tao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoi dau tao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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