Perhaps you should try some spelling variations:
"dung thiet cho snippets" » "luong thiet cho snippets", "tuong thiet cho snippets", "dung chien cho snippets", "dung hiem cho snippets", "dung nhiet co snippets", "dung viet cho snippets"
"dung java java snippets" » "dung 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 thiet cho snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung thiet cho snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung thiet cho snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung thiet cho snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.