Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lieu co cho snippets" » "lieu so cho snippets", "lieu cong cho snippets", "lieu hoc cho snippets", "lieu cao cho snippets", "lieu con cho snippets", "lieu co che 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: (((("lieu co cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lieu co cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lieu co cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lieu co cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.