Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan chi he snippets" » "luan chi he snippets", "van chi he snippets", "san chi he snippets", "lan chi ha snippets", "lan chi hieu snippets", "lan choi hee 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: (((("lan chi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lan chi he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan chi he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan chi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.