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