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