Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban mai hoc snippets" » "ban moi hoc snippets", "ban ma hoc snippets", "ban gai hoc snippets", "ban dai hoc snippets", "ban bai hoc snippets", "ban mi 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: (((("ban mai 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: (((("ban mai hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban mai hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban mai hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.