Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan thi bo snippets" » "dan thi bo snippets", "doanh tai bo snippets", "hoang thi bo snippets", "doan thi bao snippets", "doan thi mo snippets", "doan thi ba 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: (((("doan thi bo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan thi bo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan thi bo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan thi bo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.