Perhaps you should try some spelling variations:
"chon dat nuoc snippets" » "hon dat nuoc snippets", "chinh dat nuoc snippets", "cho dao nuoc snippets", "chon dat nuoc slippers", "chon dat quoc snippets", "chon dat duoc snippets", "chon dat ngoc snippets"
"dung va java snippets" » "dung java java snippets", "dung va 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 va java snippets") or ("chon dat nuoc snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung va java snippets") OR ("chon dat nuoc snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung va java snippets ) or ( chon dat nuoc snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung va java snippets") or ("chon dat nuoc snippets"))) or ("locating bug code snippets"))*.