Perhaps you should try some spelling variations:
"dung dung co snippets" » "duong dung co snippets", "ung dung co snippets", "dung ung co snippets", "dung dung cho snippets", "dung dung cong snippets", "dung dung cua snippets"
"chung vi code snippets" » "chung cu code snippets", "chung tu code snippets", "hung v code snippets", "chung vi core snippets"
"locating bug code snippets" » "locating bug core 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: (((("dung dung co snippets") or ("chung vi code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dung co snippets") OR ("chung vi code snippets"))) OR ("locating bug code snippets")).
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