Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"sach phat n2 snippets" » "sach nha n2 snippets", "sach tham n2 snippets", "cach pha n2 snippets", "sach nhat n2 snippets", "sach phap n2 snippets", "sach phuat na snippets", "sach phat n2 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: (((("sach phat n2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sach phat n2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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