Perhaps you should try some spelling variations:
"trinh cau cach snippets" » "trinh chat cach snippets", "trinh chao cach snippets", "trinh tu cach snippets", "trinh cai cach snippets", "trinh cac cach snippets", "trinh ca cach snippets"
"dung hung code snippets" » "dung chung code snippets", "dung nhung code snippets", "dung huong code snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"trinh cau cach snippets\") OR (\"dung hung code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( trinh cau cach snippets ) OR ( dung hung code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh cau cach snippets") OR ("dung hung code snippets"))) OR ("locating bug code snippets"))*.