Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"using real java snippets" » "using metal java snippets", "using raw java snippets"
"van cong tai snippets" » "van dong tai snippets", "van phong tai snippets", "phan cong tai snippets", "van cong thai snippets", "van cong tac 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 real java snippets") or ("van cong tai snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using real java snippets") OR ("van cong tai snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using real java snippets ) or ( van cong tai snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using real java snippets") or ("van cong tai snippets"))) or ("locating bug core snippets"))*.