Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong dot canh snippets" » "cong mot canh snippets", "cong dong canh snippets", "cong doan canh snippets", "cong do canh snippets", "cong doi canh snippets", "cong mot cach 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 dot canh 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 dot canh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong dot canh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dot canh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.