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