Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung tin cam snippets" » "dong tin cam snippets", "luong tin cam snippets", "dung tren cam snippets", "dung tinh cam snippets", "dung tin cac snippets", "dung trinh cam 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 ("dung tin cam snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dung tin cam snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dung tin cam snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dung tin cam snippets"))) or ("locating bug code snippets"))*.