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", "doi trong code slippers"
"using _ java snippets" » "using _ java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs 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: (((("using _ java snippets") or ("doi trong code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using _ java snippets") OR ("doi trong code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using _ java snippets ) or ( doi trong code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using _ java snippets") or ("doi trong code snippets"))) or ("locating bug code snippets"))*.