Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"doc than cua snippets" » "doc than code snippets", "doc thanh cua snippets", "doc phan cua snippets", "doc thau cua snippets", "doc nhan cua snippets", "doc thai cua snippets", "doc ban cua 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: (((("doc than cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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