Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"nhat moi con snippets" » "nha moi con snippets", "nhat mpsi con snippets", "nhap mon con snippets", "nhat moi cong snippets", "nhat moi co snippets", "nhat mot con 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: (((("nhat moi con snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhat moi con snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat moi con snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat moi con snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.