Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"wei tang hoc snippets" » "wei tan hoc snippets", "wei zhang hoc snippets", "le tang hoc snippets", "wei nang hoc snippets", "wei tang ho snippets", "wei bang hoc 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 tang hoc 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 tang hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( wei tang hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("wei tang hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.