Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chi tieu do snippets" » "chi tiet do snippets", "chi hieu do snippets", "cai tien do snippets", "chi trieu do snippets", "chi tien do snippets", "chi bieu do 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: (((("chi tieu 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: (((("chi tieu do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chi tieu do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chi tieu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.