Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"han lieu hoc snippets" » "han dieu hoc snippets", "dan lieu hoc snippets", "han tieu hoc snippets", "han lieu khoa snippets", "han li 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: (((("han lieu 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: (((("han lieu hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han lieu hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han lieu hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.