Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu theo don snippets" » "thue theo don snippets", "thu thao don snippets", "tu theo don snippets", "thu theo dong snippets", "thu theo doi snippets", "thu theo duong 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 theo don 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 theo don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu theo don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu theo don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.