Perhaps you should try some spelling variations:
"cuong voi chat snippets" » "cuong vo chat snippets", "tuong voi chat snippets", "cuong bai chat snippets", "cuong voi nhat snippets", "cuong van chat snippets", "cuong hop chat 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: (((("cuong voi chat 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 voi chat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cuong voi chat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cuong voi chat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.