Perhaps you should try some spelling variations:
"trinh quang dam snippets" » "tinh quang dam snippets", "trinh quan dam snippets", "tranh quang dam snippets", "trinh quang nam snippets", "trinh quang lam snippets", "trinh quang dai snippets", "trinh quang dam slippers"
"dung cac code snippets" » "luong cac code snippets", "dung cho code snippets", "dung tai code snippets", "dung cac cong snippets", "dung cac co snippets", "dung cac che snippets", "dung cac code 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 quang dam snippets") or ("dung cac code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh quang dam snippets") OR ("dung cac code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh quang dam snippets ) or ( dung cac code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh quang dam snippets") or ("dung cac code snippets"))) or ("locating bug code snippets"))*.