Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan thi loc snippets" » "dan thi loc snippets", "doanh tai loc snippets", "hoang thi loc snippets", "doan chi loc snippets", "doan thi goc snippets", "doan thi lo 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 loc 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 loc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan thi loc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan thi loc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.