Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"den vung va snippets" » "ben vung va snippets", "dan vung va snippets", "tren vung va snippets", "den dung va snippets", "den luong va snippets", "den duong va 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: "((((\"den vung va snippets\") OR (\"python using java snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( den vung va snippets ) OR ( python using java snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("den vung va snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))*.