Perhaps you should try some spelling variations:
"dao cong chat snippets" » "dao cong nhat snippets", "dao cong cua snippets", "dao cong ha snippets", "dao cuong chat snippets", "cao cong chat snippets", "dao dong 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: (((("dao cong 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: (((("dao cong chat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao cong chat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao cong chat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.