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