Perhaps you should try some spelling variations:
"trinh hon nhanh snippets" » "trinh hoan nhanh snippets", "trinh han nhanh snippets", "trinh hoa nhanh snippets", "trinh hoc nhanh snippets", "trinh hon nhan snippets", "trinh hon hanh snippets", "trinh hon nhanh slippers"
"dung dung code snippets" » "duong dung code snippets", "ung dung code snippets", "dung ung code snippets", "dung dung cong snippets", "dung dung co snippets", "dung dung de snippets", "dung dung 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 hon nhanh snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh hon nhanh snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh hon nhanh snippets ) or ( dung dung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh hon nhanh snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))*.