Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cheng lu cac snippets" » "cheng lu code snippets", "cheng lin cac snippets", "zheng liu cac snippets", "chen yu cac snippets", "cheng tu cac snippets", "cheng li cac snippets", "cheng ly cac 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: (((("cheng lu cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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