Perhaps you should try some spelling variations:
"using sat cong snippets" » "using data cong snippets", "using a cong snippets", "using raw cong snippets", "using bat cong snippets", "using san cong snippets", "using luat cong snippets"
"tran sach han snippets" » "tran mach han snippets", "ngan sach han snippets", "tran manh han snippets", "tran sach tham snippets", "tran sach danh snippets", "tran sach nang 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.

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