Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"doan bien do snippets" » "doan bien code snippets", "doan dien do snippets", "doan thien do snippets", "doanh tien do snippets", "doan bien doi snippets", "doan bien so snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data 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 bien do snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan bien do snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( doan bien do snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan bien do snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.