Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"doi hien ca snippets" » "doi dien ca snippets", "doi bien ca snippets", "doi kien ca snippets", "doi hien cac snippets", "doi hien cau snippets", "doi hien cua 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: (((("doi hien ca snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi hien ca snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi hien ca snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi hien ca snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.