Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"co doi chon snippets" » "co voi chon snippets", "co doi chinh snippets", "co doi phong snippets", "cho doi chon snippets", "co dot chon snippets", "co dai chon snippets"
"locating bug code snippets" » "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: (((("co doi chon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("co doi chon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( co doi chon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("co doi chon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.