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