Perhaps you should try some spelling variations:
"python using code snippets" » "python using cfd snippets", "python using one snippets"
"cho viet da snippets" » "co viet da snippets", "tho viet da snippets", "ho viet da snippets", "cho viet dao snippets", "cho viet dat snippets", "cho viet ha snippets"
"locating bug core snippets" » "locating bug code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("cho viet da snippets") or ("python using code snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cho viet da snippets") OR ("python using code snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cho viet da snippets ) or ( python using code snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho viet da snippets") or ("python using code snippets"))) or ("locating bug core snippets"))*.