Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chu viet do snippets" » "che viet do snippets", "khau viet do snippets", "su viet do snippets", "chu viet dao snippets", "chu viet doi snippets", "chu viet o 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: (((("chu viet 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: (((("chu viet do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chu viet do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chu viet do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.