Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"trinh toan php snippets" » "tinh toan php snippets", "thanh toan php snippets", "trinh han php snippets", "trinh toan phan snippets", "trinh toan phai snippets", "trinh toan tap snippets"
"locating bug code slippers" » "locating bung code slippers", "locating bugs 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: (((("using java code snippets") or ("trinh toan php snippets"))) or ("locating bug code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("trinh toan php snippets"))) OR ("locating bug code slippers")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( trinh toan php snippets ))) or ( locating bug code slippers )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("trinh toan php snippets"))) or ("locating bug code slippers"))*.