Perhaps you should try some spelling variations:
"tra trinh cau snippets" » "qua trinh cau snippets", "tra trinh chat snippets", "tra trinh chao snippets", "tra trinh tu 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("tra trinh cau snippets") or ("dung hung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tra trinh cau snippets") OR ("dung hung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra trinh cau snippets ) or ( dung hung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra trinh cau snippets") or ("dung hung code snippets"))) or ("locating bug code snippets"))*.