Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"toc ban tran snippets" » "toc ban trang snippets", "toc tan tran snippets", "toc ban than snippets", "toc san tran snippets", "toc ba tran snippets", "hoc ban tran snippets"

Try widening your search to All Fields.

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