Perhaps you should try some spelling variations:
"tran quynh cu snippets" » "tran quang cu snippets", "tran quy cu snippets", "truc quynh cu snippets", "tran quynh phu snippets", "tran quynh luu snippets", "tran quynh nhu 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: (((("tran quynh cu snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran quynh cu snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran quynh cu snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran quynh cu snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.