Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan chon le snippets" » "lua chon le snippets", "luan chinh le snippets", "luan chung le snippets", "luan hon le snippets", "luan chon loc snippets", "luan chong li 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: (((("luan chon le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan chon le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan chon le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan chon le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.