Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu cho con snippets" » "thu chi con snippets", "thu co con snippets", "thu thao con snippets", "thu cho cong snippets", "thu cho lon snippets", "thu cho can 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 cho con 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 cho con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu cho con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu cho con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.