Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tran doan cua snippets" » "tran doan code snippets", "trang doan cua snippets", "tan doan cua snippets", "tran hoan cua snippets", "tran doanh cua snippets", "tran dan cua snippets", "tran toan cua 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 cua 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 cua snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( tran doan cua snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran doan cua snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.