Perhaps you should try some spelling variations:
"cuong dung coc snippets" » "tuong duong coc snippets", "ung dung coc snippets", "thong dung coc snippets", "cuong dung co snippets", "cuong dung cac snippets", "cuong dung hoc snippets"
"cong dung con snippets" » "cong dong con snippets", "cong luong con snippets", "thong dung con snippets", "cong dung cong snippets", "cong dung von snippets", "cong dung co snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("cuong dung coc snippets") or ("cong dung con snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cuong dung coc snippets") OR ("cong dung con snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cuong dung coc snippets ) or ( cong dung con snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cuong dung coc snippets") or ("cong dung con snippets"))) or ("locating bug code snippets"))*.