Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc dong vo snippets" » "luu dong vo snippets", "duc dong vo snippets", "luc cong vo snippets", "luc dong von snippets", "luc dong voi snippets", "luc dong co 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 dong vo 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 dong vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc dong vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc dong vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.