Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"con trong ca snippets" » "cong trong ca snippets", "chon trong ca snippets", "con truong ca snippets", "con trong cac snippets", "con trong van snippets", "con trong nha 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 ("con trong ca snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("con trong ca snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( con trong ca snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("con trong ca snippets"))) or ("locating bug code snippets"))*.