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