Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cuong su cao snippets" » "luong su cao snippets", "cong su cao snippets", "cuong tu cao snippets", "cuong cu cao snippets", "cuong vu cao snippets", "cuong su co 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: (((("cuong su cao snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cuong su cao snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cuong su cao snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cuong su cao snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.