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