Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh nam hoc snippets" » "dan nam hoc snippets", "dinh nam hoc snippets", "dang nam hoc snippets", "danh nam moc snippets", "danh nam hoi snippets", "danh am 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: (((("danh nam 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: (((("danh nam hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh nam hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh nam hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.