Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"trong mach o snippets" » "trong cac o snippets", "trong minh o snippets", "trong anh o snippets", "trong mach so snippets", "trong mach _ snippets", "trong mach cao 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using java core snippets") or ("trong mach o snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java core snippets") OR ("trong mach o snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java core snippets ) or ( trong mach o snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java core snippets") or ("trong mach o snippets"))) or ("locating bug code snippets"))*.