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