Perhaps you should try some spelling variations:
"trinh tin mach snippets" » "trinh kinh mach snippets", "trinh toan mach snippets", "trinh tu mach snippets", "trinh tinh mach snippets", "trinh tim mach snippets", "trinh tin sach snippets", "trinh tin mach 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 tin mach 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 tin mach snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets")).
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