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