Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"han na hoc snippets" » "han va hoc snippets", "han n3 hoc snippets", "hanh nam hoc snippets", "han nha hoc snippets", "han n1 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 na 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 na hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han na hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han na hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.