Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"trinh mach cao snippets" » "tinh mach cao snippets", "trinh lich cao snippets", "trinh minh cao snippets", "trinh mac ca snippets", "trinh sach cap snippets", "trinh mach lac snippets"
"dung java java snippets" » "dung va java 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 mach cao snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("trinh mach cao snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( trinh mach cao snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("trinh mach cao snippets"))) or ("locating bugs code snippets"))*.