Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua danh toc snippets" » "qua dan toc snippets", "luan danh toc snippets", "luat danh toc snippets", "qua danh hoc snippets", "qua danh thuc 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: (((("qua danh toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("qua danh toc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua danh toc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua danh toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.