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