Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dat ngan cua snippets" » "dat ngan code snippets", "dai ngan cua snippets", "dan ngan cua snippets", "dat ngap cua snippets", "dat nhan cua snippets", "dat nan cua snippets", "dat ngan xua 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: (((("dat ngan cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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