Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dan tinh hoc snippets" » "doan tinh hoc snippets", "dang tinh hoc snippets", "dan trinh hoc snippets", "dan sinh hoc snippets", "dan tin hoc snippets", "dan hinh hoc 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 tinh hoc 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 tinh hoc snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan tinh hoc snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan tinh hoc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.