Perhaps you should try some spelling variations:
"cau doc trinh snippets" » "cau doc tinh snippets", "cau doi trinh snippets", "cau hoc trinh snippets", "chau doc trinh snippets", "cau do trinh snippets", "cau doc trinh slippers"
"python using a snippets" » "python using a slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"cau doc trinh snippets\") OR (\"python using a snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( cau doc trinh snippets ) OR ( python using a snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("cau doc trinh snippets") OR ("python using a snippets"))) OR ("locating bug code snippets"))*.