Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"dung cua cham snippets" » "dung luan cham snippets", "dung cho cham snippets", "dung cua cha snippets", "dung qua cham snippets", "dung ca 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 cua cham snippets") or ("data using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cua cham snippets") OR ("data using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cua cham snippets ) or ( data using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cua cham snippets") or ("data using java snippets"))) or ("locating bug code snippets"))*.