Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc nam cac snippets" » "duc nam cac snippets", "luc lam cac snippets", "luc tam cac snippets", "luc nam cao snippets", "luc nam sach 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 nam cac 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 nam cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc nam cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc nam cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.