Perhaps you should try some spelling variations:
"danh thi doan snippets" » "danh thi code snippets", "danh thin doan snippets", "dinh thi doan snippets", "dang thi doan snippets", "danh thai doan snippets", "danh thi hoan snippets", "danh thi loan 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 thi doan 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 thi doan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( danh thi doan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("danh thi doan snippets"))) or ("locating bug core snippets"))*.