Perhaps you should try some spelling variations:
"nang java java snippets" » "nang va java snippets"
"dung co cham snippets" » "dung cho cham snippets", "dung cong cham snippets", "dung cua cham snippets", "dung ca cham snippets", "dung co champa snippets", "dung cao chat 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: (((("nang java java snippets") or ("dung co cham snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nang java java snippets") OR ("dung co cham snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nang java java snippets ) or ( dung co cham snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nang java java snippets") or ("dung co cham snippets"))) or ("locating bug code snippets"))*.