Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"doc cao chi snippets" » "doc cao code snippets", "hoc cao chi snippets", "do cao chi snippets", "doc dao chi snippets", "doc cao cho snippets", "doc bao chi snippets", "doc cao thi 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: (((("doc cao chi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc cao chi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( doc cao chi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc cao chi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.