Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"kho canh lee snippets" » "kho tang lee snippets", "thu canh lee snippets", "cho can lee snippets", "kho manh le snippets", "kho anh le snippets", "kho cach le 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: (((("kho canh lee snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("kho canh lee snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kho canh lee snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kho canh lee snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.