Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong tap toan snippets" » "cuong tap toan snippets", "cong tac toan snippets", "cong tan toan snippets", "cong tap doan snippets", "cong tap quan snippets", "cong bai toan 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 tap toan 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 tap toan snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong tap toan snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong tap toan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.