Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che cua hoc snippets" » "cheo cua hoc snippets", "chi cua hoc snippets", "chu cua hoc snippets", "che cua hoi snippets", "che cua thuoc snippets", "che cua nuoc 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 cua 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 cua hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che cua hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che cua hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.