Perhaps you should try some spelling variations:
"thi tran quoc snippets" » "thi trung quoc snippets", "thi han quoc snippets", "thi tran duc snippets", "thi trang quoc snippets", "thi thanh quoc snippets", "thi lan quoc snippets"
"python using a slippers" » "python using a slippery", "python using a grippers"
"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.

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