Perhaps you should try some spelling variations:
"xanh hanh cad snippets" » "danh thanh cad snippets", "ban hanh cad snippets", "van hanh cad snippets", "xanh hanh cac snippets", "xanh hanh cat snippets", "xanh hanh cap snippets"
"dung java java snippets" » "dung va java 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: (((("xanh hanh cad snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xanh hanh cad snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xanh hanh cad snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xanh hanh cad snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.