Perhaps you should try some spelling variations:
"co van chien snippets" » "co van code snippets", "co van hien snippets", "co van hieu snippets", "co van tien snippets", "cao van chien snippets", "vo van chien snippets", "so van chien snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"

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

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