Perhaps you should try some spelling variations:
"dung hung trong snippets" » "dung huong trong snippets", "dung dung trong snippets", "dung cung trong snippets", "dung chung trong snippets", "dung nhung trong snippets", "dung hung trong slippers"
"trinh cfd code snippets" » "trinh cad code snippets", "trinh co code snippets", "trinh cau code snippets", "trinh cfd core snippets", "trinh cfd code slippers"
"locating bug code snippets" » "locating bug core 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 cfd code snippets") or ("dung hung trong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh cfd code snippets") OR ("dung hung trong snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("trinh cfd code snippets") or ("dung hung trong snippets"))) or ("locating bug code snippets"))*.