Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran quoc su slippers" » "trung quoc su slippers", "han quoc su slippers", "tran duc su slippers", "tran quoc suu slippers", "tran luoc su slippers", "tran duoc su slippers", "tran quoc su slippery", "tran quoc su grippers"
"locating bug code snippets" » "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 quoc su slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran quoc su slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("tran quoc su slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.