Perhaps you should try some spelling variations:
"danh thuc chan snippets" » "dan thuc chan snippets", "anh thuc chan snippets", "dinh thuc chan snippets", "danh thuc can snippets", "danh thuc nhan snippets", "danh thuc phan snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("danh thuc chan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh thuc chan snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh thuc chan snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh thuc chan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.