Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"da thu hoai snippets" » "da thu code snippets", "da thi hoai snippets", "da thu hai snippets", "da thu hoan snippets", "dat thu hoai snippets", "dai thu hoai snippets", "dan thu hoai 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: (((("da thu hoai snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("da thu hoai snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( da thu hoai snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("da thu hoai snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.