Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dung ca chua snippets" » "dung ca code snippets", "dung cua chua snippets", "dung cac chua snippets", "dung cam chua snippets", "dung ca cua snippets", "dung sua chua 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 ca chua snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
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