Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"co phanh lee snippets" » "co phan le snippets", "co thanh le snippets", "co han lee snippets", "co phan lee snippets", "co thanh lee snippets", "co hanh lee 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: (((("co phanh 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: (((("co phanh lee snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( co phanh lee snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("co phanh lee snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.