Perhaps you should try some spelling variations:
"python using soft grippers" » "python using sat grippers", "python using soft slippers"
"_ tien thi slippery" » "_ trien thi slippery", "_ tiep thi slippery", "_ tien khi slippery", "_ tin thi slippery", "_ tien thi slippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets", "locating bug code slippers"

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 soft grippers") or ("_ tien thi slippery"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using soft grippers") OR ("_ tien thi slippery"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using soft grippers ) or ( _ tien thi slippery ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using soft grippers") or ("_ tien thi slippery"))) or ("locating bug code snippets"))*.