Perhaps you should try some spelling variations:
"trinh san cong snippets" » "trinh han cong snippets", "trinh van cong snippets", "trinh quan cong snippets", "trinh sang cong snippets", "trinh ban cong snippets"
"dong san code snippets" » "cong san code snippets", "dong bang code snippets", "dong von code snippets", "dong san co snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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 san cong snippets") or ("dong san code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh san cong snippets") OR ("dong san code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh san cong snippets ) or ( dong san code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh san cong snippets") or ("dong san code snippets"))) or ("locating bug code snippets"))*.