Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nham thuc do snippets" » "nhan thuc do snippets", "nam thuc do snippets", "nham thu do snippets", "nham thuc doi snippets", "nham thuoc do snippets", "nham thuc co 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: (((("nham thuc do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nham thuc do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nham thuc do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nham thuc do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.