Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc khoi le snippets" » "buoc khoi le snippets", "cuoc khoi le snippets", "phuc khoi le snippets", "luc hoi le snippets", "luc khoi de snippets", "luc khoi he 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: (((("luc khoi 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: (((("luc khoi le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc khoi le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc khoi le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.