Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tong luan can snippets" » "tong luan code snippets", "tang luan can snippets", "dung luan can snippets", "hang luan can snippets", "tong luan van snippets", "tong luan san snippets", "tong luan han 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: (((("tong luan can snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tong luan can snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( tong luan can snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tong luan can snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.