Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phuc so hoc snippets" » "phuc co hoc snippets", "phuc su hoc snippets", "phuc se hoc snippets", "phuc mo hoc snippets", "phuc so 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: (((("phuc so 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: (((("phuc so hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phuc so hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phuc so hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.