Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"thuong viet can snippets" » "thuong viet van snippets", "thuong viet ca snippets", "thuong vien can snippets", "truong viet can snippets", "huong viet can snippets", "thong viet can 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: (((("thuong viet can snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thuong viet can snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thuong viet can snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thuong viet can snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.