Perhaps you should try some spelling variations:
"python using soft grippers" » "python using sat grippers", "python using soft slippers"
"thap doi _ snippets" » "thay doi _ snippets", "thai doi _ snippets", "thanh doi _ snippets"
"locating bug code snippets" » "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: "((((\"python using soft grippers\") OR (\"thap doi _ snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( python using soft grippers ) OR ( thap doi _ snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using soft grippers") OR ("thap doi _ snippets"))) OR ("locating bug code snippets"))*.