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"
"thuc so cong snippets" » "thuoc so cong snippets", "thuc co cong snippets", "thuc su cong snippets", "thuc bo cong snippets", "thuc cao cong snippets", "thuc hoc cong 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: (((("python using code snippets") or ("thuc so cong snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using code snippets") OR ("thuc so cong snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using code snippets ) or ( thuc so cong snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using code snippets") or ("thuc so cong snippets"))) or ("locating bug core snippets"))*.