Perhaps you should try some spelling variations:
"quang tran thi snippets" » "quang tuan thi snippets", "quang trung thi snippets", "quang thanh thi snippets"
"using a core snippets" » "using _ core snippets", "using a care snippets", "using a corn snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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 a core snippets") OR ("quang tran thi snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using a core snippets ) or ( quang tran thi snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using a core snippets") or ("quang tran thi snippets"))) or ("locating bug code snippets"))*.