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