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