Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong li doi snippets" » "cong ti doi snippets", "hong li doi snippets", "cong hai doi snippets", "cong li dai snippets", "cong ly doi snippets", "cong lieu doi 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 li doi 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 li doi snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong li doi snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong li doi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.