Perhaps you should try some spelling variations:
"dung cau chat snippets" » "dung cau code snippets", "dung chau chat snippets", "dung cu chat snippets", "dung cac chat snippets", "dung cao chat snippets", "dung cau hat snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung trinh java snippets" » "dung tinh java snippets", "dong trinh java snippets", "cong trinh 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: (((("dung cau chat snippets") or ("dung trinh java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cau chat snippets") OR ("dung trinh java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung cau chat snippets ) or ( dung trinh java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cau chat snippets") or ("dung trinh java snippets"))) or ("locating bug core snippets"))*.