Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi thi hoc snippets" » "phi tai hoc snippets", "chi thi hoc snippets", "phi phi hoc snippets", "phi thai hoc snippets", "phi tri hoc snippets", "phi thi 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: (((("phi thi 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: (((("phi thi hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi thi hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi thi hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.