Perhaps you should try some spelling variations:
"python using code snippets" » "python using cfd snippets", "python using one snippets"
"qua cao danh snippets" » "qua cao dang snippets", "qua cao anh snippets", "qua cau danh snippets", "qua cac danh snippets", "qua ca danh snippets", "qua cai danh 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: (((("python using code snippets") OR ("qua cao danh snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"python using code snippets\") OR (\"qua cao danh snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( python using code snippets ) OR ( qua cao danh snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using code snippets") OR ("qua cao danh snippets"))) OR ("locating bug core snippets"))*.