Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong cac che snippets" » "cuong cac che snippets", "cong tac che snippets", "cong cau che snippets", "cong cac he snippets", "cong cac chien snippets", "cong cac chat 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: (((("cong cac che snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong cac che snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong cac che snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong cac che snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.