Perhaps you should try some spelling variations:
"trong dong cuon snippets" » "trong cong cuon snippets", "trong nong cuon snippets", "trong dang cuon snippets", "trong dong duong snippets", "trong dong huong snippets", "trong dang cuong 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 java java snippets") or ("trong dong cuon snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("trong dong cuon snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( trong dong cuon snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("trong dong cuon snippets"))) or ("locating bug code snippets"))*.