Perhaps you should try some spelling variations:
"tran phong mat snippets" » "tran hong mat snippets", "van phong mat snippets", "tran hoang mat snippets", "tran phuong mai snippets", "tran phong va snippets", "tran phong nam snippets", "tran phong mat 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: (((("tran phong mat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran phong mat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran phong mat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran phong mat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.