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