Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu dat cho snippets" » "thue dat cho snippets", "tu dat cho snippets", "thu da cho snippets", "thu dac cho snippets", "thu day cho snippets", "thu dan cho 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 dat cho 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 dat cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu dat cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu dat cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.