Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cuong do he snippets" » "cuong dao he snippets", "cuong vo he snippets", "luong do he snippets", "cuong do ke snippets", "cuong do le snippets", "cuong do ve 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 ("cuong do he snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("cuong do he snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( cuong do he snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("cuong do he snippets"))) or ("locating bug code snippets"))*.