Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung do sach snippets" » "dung doi sach snippets", "dung co sach snippets", "dung de sach snippets", "dung doc sach snippets", "dung do sanh snippets", "dung bo sach 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 code snippets") OR ("dung do sach snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using java code snippets\") OR (\"dung do sach snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( using java code snippets ) OR ( dung do sach snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") OR ("dung do sach snippets"))) OR ("locating bug core snippets"))*.