Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"tran chi con snippets" » "trang chi con snippets", "tran thi con snippets", "toan chi con snippets", "tran chi cong snippets", "tran cho con snippets", "tran khi con 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: (((("tran chi con snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran chi con snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran chi con snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran chi con snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.