Perhaps you should try some spelling variations:
"cong cuoc do snippets" » "song cuoc do snippets", "trong cuoc do snippets", "luong cuoc do snippets", "cong cuoc doi snippets", "cong cuoc o snippets", "cong cuc do snippets"
"dung java java snippets" » "dung va java 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 cuoc do 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 cuoc do snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong cuoc do snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong cuoc do snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.