Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan hoc te snippets" » "nha hoc te snippets", "nhan hoa te snippets", "than hoc te snippets", "nhan hoc tu snippets", "nhan 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: (((("nhan 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: (((("nhan hoc te snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan hoc te snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan hoc te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.