Perhaps you should try some spelling variations:
"dung qua chat snippets" » "dung qua code snippets", "duong qua chat snippets", "dung quan chat snippets", "dung cua chat snippets", "dung qua nhat snippets", "dung qua cham snippets", "dung luan 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: (((("dung qua 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: (((("dung qua chat snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung qua chat snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung qua chat snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.