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