Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"luan anh tao snippets" » "luan danh tao snippets", "tuan anh tao snippets", "lan anh tao snippets", "luan anh tho snippets", "luan anh ta snippets", "luan anh tai snippets", "luan anh tao 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: (((("luan anh tao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan anh tao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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