Perhaps you should try some spelling variations:
"bac viet trinh slippery" » "bac viet trung slippery", "bac viet thanh slippery", "bac viet trong slippery", "hoc viet trinh slippery", "mai viet trinh slippery", "dao viet trinh slippery", "bac viet 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using a snippets") or ("bac viet trinh slippery"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using a snippets") OR ("bac viet trinh slippery"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( python using a snippets ) or ( bac viet trinh slippery ))) or ( locating bug code snippets ))*.