Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"liu ying tan snippets" » "liu ming tan snippets", "liu yang tan snippets", "liu yaning tan snippets", "liu jing tan snippets", "liu ying wang snippets", "liu giang tan snippets", "liu ying tan slippers"
"locating bug code snippets" » "locating bug code slippers", "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 ying tan 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 ying tan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( liu ying tan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("liu ying tan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.