Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tran tan cua snippets" » "tran tan code snippets", "tran tuan cua snippets", "tran van cua snippets", "tran thanh cua snippets", "tran than cua snippets", "tran tang cua snippets", "tran toan 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: (((("tran tan cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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