Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"lua cau thac snippets" » "lua cao thach snippets", "lua cau thang snippets", "lua cau thi snippets", "luat cau thac snippets", "cua cau thac snippets", "quan cau thac snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("lua cau thac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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