Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"doi dan dong snippets" » "doi dan code snippets", "doi van dong snippets", "doi dan dung snippets", "doi dao dong snippets", "hoi dan dong snippets", "doi ban dong snippets", "doi dau dong snippets"
"python using java snippets" » "python using data 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 dan dong snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi dan dong snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( doi dan dong snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi dan dong snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.