Perhaps you should try some spelling variations:
"dang java java snippets" » "dang va java snippets"
"dung dang do snippets" » "dung dan do snippets", "dung dong do snippets", "dung danh do snippets", "dung nang doc snippets", "dung dung doi snippets", "dung dang duc 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: (((("dang java java snippets") or ("dung dang do snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang java java snippets") OR ("dung dang do snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang java java snippets ) or ( dung dang do snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang java java snippets") or ("dung dang do snippets"))) or ("locating bug code snippets"))*.