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