Perhaps you should try some spelling variations:
"python using sat grippers" » "python using soft grippers", "python using data grippers", "python using a grippers", "python using raw grippers"
"thu hanh 07 snippets" » "thuc hanh 07 snippets", "thu thanh 07 snippets", "thuy hanh 07 snippets", "thu hanh 07 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: "((((\"thu hanh 07 snippets\") OR (\"python using sat grippers\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( thu hanh 07 snippets ) OR ( python using sat grippers ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("thu hanh 07 snippets") OR ("python using sat grippers"))) OR ("locating bug code snippets"))*.