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