Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van cao toc snippets" » "van cao code snippets", "van dao toc snippets", "van bao toc snippets", "van cau toc snippets", "van cac toc snippets", "van cao hoc snippets", "van cao ngoc 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: (((("van cao toc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van cao toc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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