Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thuat cua de snippets" » "thuat sua de snippets", "thuat bua de snippets", "thuat ca de snippets", "thuat cua te snippets", "thuat cua du snippets", "thuat cua 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: (((("thuat cua de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thuat cua de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thuat cua de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thuat cua de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.