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