Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong dan cho snippets" » "cong dan code snippets", "cong san cho snippets", "cong tan cho snippets", "huong dan cho snippets", "cong danh cho snippets", "cong dac cho 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: (((("cong dan cho snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong dan cho snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong dan cho snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dan cho snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.