Perhaps you should try some spelling variations:
"dung minh cua snippets" » "duong minh cua snippets", "dung ninh cua snippets", "dung vinh cua snippets", "dung manh cua snippets", "dung sinh cua snippets", "dung tinh cua 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 minh cua 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 minh cua snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung minh cua snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung minh cua snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.