Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che viet hoc snippets" » "chu viet hoc snippets", "nghe viet hoc snippets", "thue viet hoc snippets", "che viet goc snippets", "che triet hoc snippets", "che nhiet hoc 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: (((("che viet hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("che viet hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che viet hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che viet hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.