Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"du cac cong snippets" » "du cac code snippets", "du cua cong snippets", "duc cac cong snippets", "tu cac cong snippets", "do cac cong snippets"
"python using java snippets" » "python using data 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: "((((\"du cac cong snippets\") OR (\"python using java snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( du cac cong snippets ) OR ( python using java snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("du cac cong snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))*.