Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"danh cho son snippets" » "danh cho code snippets", "danh cho lon snippets", "danh cao son snippets", "danh cho san snippets", "doanh cho son snippets", "dan cho son snippets", "dinh cho son snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("danh cho son snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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