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