Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"mau co sach snippets" » "mau bo sach snippets", "mau cuon sach snippets", "mau hoc sach snippets", "mai co sach snippets", "dau co sach snippets", "au co sach snippets"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"python using java snippets\") OR (\"mau co sach snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( python using java snippets ) OR ( mau co sach snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") OR ("mau co sach snippets"))) OR ("locating bug core snippets"))*.