Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"den cong cac snippets" » "den cong code snippets", "dien cong cac snippets", "den dong cac snippets", "len cong cac snippets", "den cuong cac snippets", "den cong tac snippets", "den cong cau 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: (((("den cong cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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