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