Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lon cao so snippets" » "lon lao so snippets", "luong cao so snippets", "toan cao so snippets", "lon cao son snippets", "lon co so snippets", "lon cao su 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 cao so 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 cao so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lon cao so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lon cao so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.