Perhaps you should try some spelling variations:
"dung cac chat snippets" » "dung cao chat snippets", "dung cac thuat snippets", "dung cac nha snippets", "luong cac chat snippets", "dung cho chat snippets", "dung tai chat snippets"
"dung va code snippets" » "dung va core snippets"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code 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 va code snippets") or ("dung cac chat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung va code snippets") OR ("dung cac chat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung va code snippets ) or ( dung cac chat snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung va code snippets") or ("dung cac chat snippets"))) or ("locating bug code snippets"))*.