Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dat viet cho snippets" » "dat viet code snippets", "dao viet cho snippets", "da viet cho snippets", "dai viet cho snippets", "dat viec cho snippets", "dat viet co snippets", "dat viet theo 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 viet cho snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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