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