Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi nhan can snippets" » "doi khang can snippets", "tri nhan can snippets", "hoi nhap can snippets", "doi nhan chan snippets", "doi nhan dan snippets", "doi nhan van 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 nhan can 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 nhan can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi nhan can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi nhan can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.