Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using real snippets" » "python using metal snippets", "python using raw 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"

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 real 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 real snippets") OR ("doc trinh tu snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using real snippets ) or ( doc trinh tu snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using real snippets") or ("doc trinh tu snippets"))) or ("locating bug core snippets"))*.