Perhaps you should try some spelling variations:
"trinh phan tach snippets" » "trinh han tach snippets", "trinh quan tach snippets", "thanh phan tach snippets", "trinh phan tich snippets", "trinh phan thanh snippets", "trinh phan tap snippets", "trinh phan tach 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: (((("dung dung code snippets") or ("trinh phan tach snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dung code snippets") OR ("trinh phan tach snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung dung code snippets") or ("trinh phan tach snippets"))) or ("locating bug code snippets"))*.