Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"quan anh cho snippets" » "quan hanh cho snippets", "quang anh cho snippets", "tuan anh cho snippets", "quan danh cho snippets", "quan anh tho snippets", "quan anh co 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 ("quan anh cho snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("quan anh cho snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( quan anh cho snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("quan anh cho snippets"))) or ("locating bug code snippets"))*.