Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu khoi he snippets" » "thu hoi he snippets", "thu phoi he snippets", "nhu khoi he snippets", "thu khoa he snippets", "thu khoi de snippets", "thu khong he 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: (((("thu khoi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu khoi he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu khoi he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu khoi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.