Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dam thi cho snippets" » "dan thi cho snippets", "dao thi cho snippets", "pham thi cho snippets", "dam thi choi snippets", "dam thi tho snippets", "dam thi thao 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: (((("dam thi cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dam thi cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dam thi cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dam thi cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.