Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi hu cua snippets" » "doi thu cua snippets", "doi nhu cua snippets", "doi su cua snippets", "doi tu cua snippets", "doi vu cua 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: (((("doi hu cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi hu cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi hu cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi hu cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.