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