Perhaps you should try some spelling variations:
"dong cua chat snippets" » "dong cua code snippets", "dung cua chat snippets", "cong cua chat snippets", "huong cua chat snippets", "dong cua cha snippets", "dong cuu chat snippets", "dong chuan chat snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java 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: (((("dong cua chat snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong cua chat snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dong cua chat snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong cua chat snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.