Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi giam doc snippets" » "phi gia doc snippets", "phap giam doc snippets", "doi giam doc snippets", "phi gian doc snippets", "phi giam dau snippets", "phi gian don 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 giam doc 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 giam doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi giam doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi giam doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.