Perhaps you should try some spelling variations:
"doi trong code snippets" » "doi trong cong snippets", "doi trong co snippets", "doi trong che snippets", "doi tuong code snippets", "dot trong code snippets", "dong trong code snippets"
"locating bug core snippets" » "locating bug code snippets"
"using a java snippets" » "using _ 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 a java snippets") OR ("doi trong code snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using a java snippets\") OR (\"doi trong code snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( using a java snippets ) OR ( doi trong code snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using a java snippets") OR ("doi trong code snippets"))) OR ("locating bug core snippets"))*.