Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"coc ban tran snippets" » "coc ban trang snippets", "coc tan tran snippets", "coc ban than snippets", "co ban tran snippets", "cac ban tran snippets", "hoc ban tran snippets"

Try widening your search to All Fields.

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