Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duy tao doi snippets" » "duc tao doi snippets", "duy hao doi snippets", "duy tan doi snippets", "duy trao doi snippets", "duy tao dai snippets", "duy tao boi snippets"
"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: (((("python using java snippets") or ("duy tao doi snippets"))) or ("locating bug code snippets"))~.
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