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