Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"liu ming doc snippets" » "liu ying doc snippets", "liu jin doc snippets", "liu yang doc snippets", "liu nang doc snippets", "liu dinh doc snippets", "liu kinh doc 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 ming doc 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 ming doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( liu ming doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("liu ming doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.