Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"wei hang ve snippets" » "wei zhang ve snippets", "wei tang ve snippets", "wei fang ve snippets", "wei hang va snippets", "wei hanh ve snippets", "wei hang ke 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: (((("wei hang ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("wei hang ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( wei hang ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("wei hang ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.