Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"duoc do trong snippets" » "duoc dot trong snippets", "duoc dao trong snippets", "duoc doi trong snippets", "duoc co trong snippets", "duoc vo trong 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 ("duoc do trong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java core snippets") OR ("duoc do trong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java core snippets ) or ( duoc do trong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java core snippets") or ("duoc do trong snippets"))) or ("locating bug code snippets"))*.