Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi cong soi snippets" » "doi song soi snippets", "noi cong soi snippets", "moi cong soi snippets", "doi cong so snippets", "doi cong goi snippets", "doi cong noi 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 cong soi 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 cong soi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi cong soi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi cong soi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.