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