Perhaps you should try some spelling variations:
"ca dat khanh snippets" » "ca van khanh snippets", "ca duy khanh snippets", "cai dat khanh snippets", "ca dao khanh snippets", "ca dan khanh snippets", "ca dat khanh slippers"
"python using a snippets" » "python using a 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: (((("ca dat khanh snippets") or ("python using a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ca dat khanh snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ca dat khanh snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ca dat khanh snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.