Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hao zhang ca snippets" » "tao zhang ca snippets", "xiao zhang ca snippets", "bao thang ca snippets", "hao hang ca snippets", "hao thang cua snippets", "hao hang 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: (((("hao zhang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hao zhang ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hao zhang ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hao zhang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.