Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luat dau le snippets" » "luat dat le snippets", "luat dan le snippets", "bat dau le snippets", "luat dau len snippets", "luat dau ve snippets", "luat dao 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: (((("luat dau 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: (((("luat dau le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luat dau le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luat dau le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.