Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong hoc cac snippets" » "dong hoc code snippets", "dong co cac snippets", "dong luc cac snippets", "dong hoc cao 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: (((("dong hoc cac snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong hoc cac snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dong hoc cac snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong hoc cac snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.