Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"tet cac nhan snippets" » "tet ca nhan snippets", "tet cac nha snippets", "tet cam nhan snippets", "tat cac nhan snippets", "te cac nhan snippets", "tet cac 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: (((("tet cac 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: (((("tet cac nhan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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