Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"dung doi gap snippets" » "huong doi gap snippets", "dung tai gap snippets", "dung co gap snippets", "dung doi dap snippets", "dung toi gap snippets", "dung doi giam snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung doi gap snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung doi gap snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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