Perhaps you should try some spelling variations:
"danh hang cau snippets" » "danh thang cau snippets", "tranh hang cau snippets", "danh thanh cau snippets", "danh hang dau snippets", "danh hang ca snippets", "danh nhung cau 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: (((("danh hang cau snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh hang cau snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh hang cau snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh hang cau snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.