Perhaps you should try some spelling variations:
"dan thiet de snippets" » "luan thiet de snippets", "toan thiet de snippets", "doan thien de snippets", "dan thiet ke snippets", "dan thiet yeu snippets", "dan thuyet de 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: (((("dan thiet de snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan thiet de snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan thiet de snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan thiet de snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.