Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"den nam trac snippets" » "den nam tra snippets", "den nam truc snippets", "den nam truoc snippets", "dan nam trac snippets", "det nam trac snippets", "den cam trac snippets"

Try widening your search to All Fields.

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