Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"voi hang o2 snippets" » "voi hang code snippets", "doi khang o2 snippets", "thi hang o2 snippets", "van hang o2 snippets", "voi hang hoa snippets", "voi hang rok snippets", "voi hang ton 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: (((("voi hang o2 snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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