Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dong hoc » dong co, dong luc
hanh dao » lanh dao, thanh dat, thanh dam
hanh dai » hanh tai, vanh dai, thanh dat
cao hoc » co hoc, cho hoc, chat hoc
hoc hoi » hoc khoi, hoc hoa, hoc noi
hieu va » lieu va
ky dong » ly dong, ky dang, ky cong
xac ky » cac ky, sac ky, bac ky
su xac » pu xac, su cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ky dong hoc hoi. ((hieu va) or (hieu qua)) cao hoc va ((hanh dai) or (hanh dao)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky dong hoc hoi. ((hieu va) OR (hieu qua)) cao hoc va ((hanh dai) OR (hanh dao)) cua triet.
• Adding a wildcard symbol may retrieve word variants: su xac ky dong hoc hoi. ((hieu va) or (hieu qua)) cao hoc va ((hanh dai) or (hanh dao)) cua triet*.