Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"wei tang duc snippets" » "wei tan duc snippets", "wei zhang duc snippets", "le tang duc snippets", "wei dang duc snippets", "wei tang du snippets", "wei lang duc snippets", "wei tang duc 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: (((("python using java snippets") or ("wei tang duc snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("wei tang duc snippets"))) OR ("locating bug code snippets")).
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