Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"den nang cau snippets" » "dun nang cau snippets", "dung nang cau snippets", "da nang cau snippets", "den nang cao snippets", "den hang cau snippets", "den nang dau 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: (((("den nang cau snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den nang cau snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den nang cau snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den nang cau snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.