Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc cau hoc snippets" » "ngoc chau hoc snippets", "ngoc chu hoc snippets", "ngoc canh hoc snippets", "ngoc cau hoi snippets", "ngoc cau hoa snippets", "ngoc cao 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: (((("ngoc cau 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: (((("ngoc cau hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc cau hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc cau hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.