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