Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban mang hoc snippets" » "ban hang hoc snippets", "ban dang hoc snippets", "ban lang hoc snippets", "ban nang hoc snippets", "ban bang hoc snippets", "ban mang loc 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 mang 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 mang hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban mang hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban mang hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.