Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra va cao snippets" » "ra va cao snippets", "tra ha cao snippets", "tran van cao snippets", "tra va cac snippets", "tra va co snippets", "tra va dao 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: (((("tra va cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tra va cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra va cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra va cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.