Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"tran thu gan snippets" » "tran thuy gan snippets", "tran thi gan snippets", "tuan thu gan snippets", "tran thu ngan snippets", "tran thu ban snippets", "tran thu san snippets", "tran thu gan slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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