Perhaps you should try some spelling variations:
"dung nhoi cho snippets" » "dung nhom cho snippets", "dung thoi cho snippets", "dung nguoi cho snippets", "dung hoi cho snippets", "dung noi cho snippets", "dung choi cho snippets"
"hang java java snippets" » "hang 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: (((("dung nhoi cho snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung nhoi cho snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung nhoi cho snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung nhoi cho snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.