Perhaps you should try some spelling variations:
"dung quan cac snippets" » "dung quang cac snippets", "dung luan cac snippets", "luong quan cac snippets", "dung quanh cac snippets", "dung qua cac snippets", "dung quan cau snippets"
"hang java java snippets" » "hang 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: (((("dung quan cac snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung quan cac snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung quan cac snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung quan cac snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.