Perhaps you should try some spelling variations:
"tran thuy cac snippets" » "thanh thuy cac snippets", "tran thi cac snippets", "tran huu cac snippets", "tran thuyet cac snippets", "tran thuc cach snippets", "tran thuy canh 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 thuy cac 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 thuy cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran thuy cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran thuy cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.