Perhaps you should try some spelling variations:
"trinh luat chat snippets" » "trinh luan chat snippets", "trinh suat chat snippets", "trinh luat dat snippets"
"dung cac co snippets" » "luong cac co snippets", "dung cho co snippets", "dung tai co snippets", "dung cac cong 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: (((("trinh luat chat snippets") or ("dung cac co snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh luat chat snippets") OR ("dung cac co snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh luat chat snippets ) or ( dung cac co snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh luat chat snippets") or ("dung cac co snippets"))) or ("locating bug code snippets"))*.