Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tran doan cap snippets" » "tran doan code snippets", "trang doan cap snippets", "tan doan cap snippets", "tran hoan cap snippets", "tran doanh cao snippets", "tran dan ca snippets", "tran toan cao snippets"
"dung java java snippets" » "dung va java 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 doan cap snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran doan cap snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( tran doan cap snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran doan cap snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.