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