Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc tang ct1 snippets" » "duc thang ct1 snippets", "duc tan ct1 snippets", "tuc tang ct1 snippets", "duc tang ct4 snippets", "duc tang ct5 snippets", "duc tang ct8 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 tang ct1 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 tang ct1 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc tang ct1 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc tang ct1 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.