Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cu viet code snippets" » "cu viet co snippets", "cu viet some snippets", "cua viet code snippets", "chu viet code snippets", "su viet code snippets"
"locating bug core snippets" » "locating bug code snippets"

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

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