Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"nhung cau java snippets" » "chung cu java snippets", "nhung bai java snippets", "nhu cau java snippets", "nhung cau va snippets", "nhung ngu java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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