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