Perhaps you should try some spelling variations:
courses tool » courses moocs, course book, course goal
dong bin » dong sin, dong di, dann bin
wan yan » wang yan, wai yan, wang yang
nan yan » nan ya, wang yan, qian yan
tool 3 » tool _, tool 4, tool 5
y la » a la, _ la
ye a » yet a, e a, me a

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((wan yan) OR (nan yan))) OR (dong bin)) ((y la) OR (ye a)) bank training courses tool 3 ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((wan yan) OR (nan yan))) or (dong bin)) ((y la) or (ye a)) bank training courses tool 3 ;~".
• Adding a wildcard symbol may retrieve word variants: ((((wan yan) OR (nan yan))) or (dong bin)) ((y la) or (ye a)) bank training courses tool 3 ;*.