Perhaps you should try some spelling variations:
"dang java java snippets" » "dang va java snippets"
"dung toan do snippets" » "dung doanh do snippets", "dung thang do snippets", "dung thanh do snippets", "dung toan ho snippets", "dung toan co snippets", "dung toan du 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 toan 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 toan do snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang java java snippets ) or ( dung toan do snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang java java snippets") or ("dung toan do snippets"))) or ("locating bug code snippets"))*.