Perhaps you should try some spelling variations:
"thong cad code snippets" » "thong cac code snippets", "thong cap code snippets", "thong cau code snippets", "thong cfd code snippets", "thong cad model snippets"
"dung hoc code slippers" » "dong hoc code slippers", "dung thuoc code slippers", "trung hoc code slippers", "dung hoc co slippers", "dung hoc cong slippers", "dung hoc de slippers"
"locating bug code snippets" » "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: (((("thong cad code snippets") or ("dung hoc code slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thong cad code snippets") OR ("dung hoc code slippers"))) OR ("locating bug code snippets")).
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