Perhaps you should try some spelling variations:
"dung nhanh dong snippets" » "dung nhanh code snippets", "dung nhan dong snippets", "vung nhanh dong snippets", "dung thanh dong snippets", "dung hanh dong snippets", "dung nhanh chong snippets", "dung anh dong snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung nhanh dong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung nhanh dong snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung nhanh dong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.