Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"nhat dan he snippets" » "nhat dan code snippets", "nhat danh he snippets", "nhat ban he snippets", "nhan dan he snippets", "nhat dan ve snippets", "nhat dan de snippets", "nhat dan ke 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: (((("nhat dan he snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhat dan he snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( nhat dan he snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat dan he snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.