Perhaps you should try some spelling variations:
"trinh tren tri snippets" » "trinh truyen tri snippets", "trinh tuyen tri snippets", "trinh tieng tri snippets", "trinh trien tri snippets", "trinh tren thi snippets", "trinh tran tri snippets", "trinh tren tri slippers"
"dung java java snippets" » "dung va java snippets", "dung java java 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 ("trinh tren tri snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("trinh tren tri snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( trinh tren tri snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("trinh tren tri snippets"))) or ("locating bug code snippets"))*.