Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"hang toi lua snippets" » "hang tai lua snippets", "hang ton lua snippets", "hang doi lua snippets", "hang toi la snippets", "hang hoi luan snippets", "hang thi luan snippets", "hang toi lua 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: (((("dung java java snippets") or ("hang toi lua snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("hang toi lua snippets"))) OR ("locating bug code snippets")).
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