Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam bat hoc snippets" » "nam bac hoc snippets", "nam ban hoc snippets", "nam nhat hoc snippets", "nam bai hoc snippets", "nam vat 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: (((("nam bat 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: (((("nam bat hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam bat hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam bat hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.