Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong dan hoc snippets" » "cong san hoc snippets", "cong tan hoc snippets", "huong dan hoc snippets", "cong van hoc snippets", "cong dan toc snippets", "cong dai 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: (((("cong dan 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: (((("cong dan hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong dan hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dan hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.