Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lon nhat co snippets" » "lan nhat co snippets", "cong nhat co snippets", "dong nhat co snippets", "lon nhat cho snippets", "lon nhat so snippets", "lon chat co 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: (((("lon nhat co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lon nhat co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lon nhat co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lon nhat co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.