Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong cho hoi snippets" » "dong cho code snippets", "dung cho hoi snippets", "dong co hoi snippets", "dong hoc hoi snippets", "dong cho hoc snippets", "dong cho moi snippets", "dong cho doi 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: (((("dong cho hoi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong cho hoi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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