Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan manh hon snippets" » "lanh manh hon snippets", "lan anh hon snippets", "van manh hon snippets", "lan manh ho snippets", "lan minh hon snippets", "lan manh huong 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 manh hon 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 manh hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan manh hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan manh hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.