Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan cac hoc snippets" » "nhan cach hoc snippets", "phan cac hoc snippets", "nhan mac hoc snippets", "nhan cac hop snippets", "nhan bac hoc 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: (((("nhan cac 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: (((("nhan cac hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan cac hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan cac hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.