Perhaps you should try some spelling variations:
"doi trong cong snippets" » "doi trong code snippets", "doi tuong cong snippets", "dot trong cong snippets", "dong trong cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"using data java snippets" » "using java java snippets", "using sat java snippets", "missing data java snippets"

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

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