Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khai hoc te snippets" » "thai hoc te snippets", "khi hoc te snippets", "khai thac te snippets", "khai hoc tu snippets", "khai hoc he 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: (((("khai hoc te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khai hoc te snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khai hoc te snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khai hoc te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.