Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"nhan cac cau snippets" » "nhan cac code snippets", "nhan cach cau snippets", "phan cac cau snippets", "nhan mac cau snippets", "nhan cac mau snippets", "nhan bac cau snippets", "nhan ca 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: (((("nhan cac cau snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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