Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"khen cau ha snippets" » "khien cau ha snippets", "khen ca ha snippets", "thien cau ha snippets", "khen cau hoa snippets", "khen cau hat snippets", "khen cau nha snippets", "khen cau ha 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: (((("khen cau ha snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khen cau ha snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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