Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dung su hoai snippets" » "dung su code snippets", "dung cu hoai snippets", "dung du hoai snippets", "dung so hoai snippets", "dung su hai snippets", "dung su hoan snippets", "dung su hoa snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung su hoai snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
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