Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"thu tao nhan snippets" » "thu giao nhan snippets", "thu ca nhan snippets", "thu tue nhan snippets", "thu thao nhan snippets", "thu bao nhan snippets", "thu tai nhan snippets", "thu tao nhan 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: (((("thu tao nhan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu tao nhan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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