Perhaps you should try some spelling variations:
"danh phap cong snippets" » "danh phap code snippets", "dinh phap cong snippets", "ban phap cong snippets", "danh nhan cong snippets", "danh phan cong snippets", "danh pham cong snippets", "danh phap phong snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"

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

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