Perhaps you should try some spelling variations:
"trinh dinh phi snippets" » "trinh kinh phi snippets", "trinh sinh phi snippets", "trinh dung phi snippets", "trinh dinh thi snippets", "trinh dinh chi snippets", "trinh dinh phu snippets", "trinh dinh phi 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 dinh phi 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 dinh phi snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh dinh phi snippets ) or ( dung dung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh dinh phi snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))*.