Perhaps you should try some spelling variations:
"trinh quoc 1 snippets" » "trinh quan 1 snippets", "chinh quoc 1 snippets", "trinh doc 1 snippets", "trinh duoc 1 snippets", "trinh quoc 2 snippets", "trinh quoc _ snippets", "trinh quoc 1 slippers"
"python using code snippets" » "python using cfd snippets", "python using one snippets", "python using code slippers"
"locating bug code snippets" » "locating bug code slippers", "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 quoc 1 snippets") or ("python using code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh quoc 1 snippets") OR ("python using code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh quoc 1 snippets ) or ( python using code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh quoc 1 snippets") or ("python using code snippets"))) or ("locating bug code snippets"))*.