Perhaps you should try some spelling variations:
"lochating bug code snippets" » "locating bug code snippets", "lochating bug core snippets"
"python using java snippets" » "python using data snippets"
"when hoc do snippets" » "khien hoc do snippets", "dien hoc do snippets", "hen ho do snippets", "when hoc doi snippets", "when hoc co snippets", "when hoc bo snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("when hoc do snippets") or ("python using java snippets"))) or ("lochating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("when hoc do snippets") OR ("python using java snippets"))) OR ("lochating bug code snippets")).
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