Perhaps you should try some spelling variations:
"trinh bang code snippets" » "trinh bong code snippets", "trinh ban code snippets", "tinh bang code snippets", "trinh bang cong snippets", "trinh bang che snippets", "trinh bang cot snippets", "trinh bang code slippers"
"dung cac thi snippets" » "luong cac thi snippets", "dung cho thi snippets", "dung tai thi snippets", "dung cac thoi snippets", "dung cau thi snippets", "dung can thi snippets", "dung cac thi slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("trinh bang code snippets") or ("dung cac thi snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh bang code snippets") OR ("dung cac thi snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh bang code snippets ) or ( dung cac thi snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh bang code snippets") or ("dung cac thi snippets"))) or ("locating bug code snippets"))*.