Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"dac van tan snippets" » "cac van tan snippets", "dao van tan snippets", "dam van tan snippets", "dac van tuan snippets", "dac van ban snippets", "dac van tai 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: "((((\"dac van tan snippets\") OR (\"python using java snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( dac van tan snippets ) OR ( python using java snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dac van tan snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))*.