Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi minh hoa snippets" » "do minh hoa snippets", "doi dinh hoa snippets", "doi kinh hoa snippets", "doi minh hoang snippets", "doi trinh hoa snippets", "doi sinh hoat 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 minh hoa 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 minh hoa snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi minh hoa snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi minh hoa snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.