Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung hanh nghe snippets" » "dung thanh nghe snippets", "dang hanh nghe snippets", "dung danh nghe snippets", "dung anh nghe snippets", "dung van nghe snippets", "dung lang nghe 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 hanh nghe 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 hanh nghe snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dung hanh nghe snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dung hanh nghe snippets"))) or ("locating bug code snippets"))*.