Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lieu nha do snippets" » "lieu khoa do snippets", "lieu phap do snippets", "lieu tham do snippets", "lieu nha o snippets", "lieu nha da snippets", "lieu nha 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: (((("lieu nha do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lieu nha do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lieu nha do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lieu nha do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.