Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc mao con snippets" » "duc dao con snippets", "duc mau con snippets", "duc man con snippets", "duc tao con snippets", "duc mao can snippets", "duc sao con 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: (((("duc mao con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc mao con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc mao con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc mao con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.