Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"liu yang du snippets" » "liu ying du snippets", "lijun yang du snippets", "liu yaning du snippets", "liu nang du snippets", "liu tang du snippets", "liu hang du 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: (((("liu yang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("liu yang du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( liu yang du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("liu yang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.