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