Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"co viet code snippets" » "co viet co snippets", "co viet some snippets", "so viet code snippets", "o viet code snippets", "hoc viet code snippets"
"locating bug code slippers" » "locating bung code slippers", "locating bugs code slippers"

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

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