Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"doi hien do snippets" » "doi hien code snippets", "doi dien do snippets", "doi bien do snippets", "doi kien do snippets", "doi hien du snippets", "doi tien do 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: (((("doi hien 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: (((("doi hien do snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( doi hien do snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi hien do snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.