Perhaps you should try some spelling variations:
"python using code snippets" » "python using cfd snippets", "python using one snippets"
"locating bug core snippets" » "locating bug code snippets"
"cuu dan so snippets" » "cuu danh so snippets", "cuu van so snippets", "cua dan so snippets", "cuu dan soc snippets", "cuu dan su snippets", "cuu dan mo 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: (((("cuu dan so snippets") or ("python using code snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cuu dan so snippets") OR ("python using code snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cuu dan so snippets ) or ( python using code snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cuu dan so snippets") or ("python using code snippets"))) or ("locating bug core snippets"))*.