Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc doc cua snippets" » "duc hoc cua snippets", "duy doc cua snippets", "duc ngoc cua snippets", "duc doi cua snippets", "duc do cua 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 doc cua 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 doc cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc doc cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc doc cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.