Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
thanh de » hanh de, thanh ve, thanh do
ve cham » va cham, ve chat, vu cham
hoi hoi » hoi hoc, hoc hoi, hoi doi
tuc ban » thuc ban, truc ban, tu ban
de cua » le cua, te cua, dieu cua
su xac » pu xac, su cac
xac ky » cac ky, sac ky, bac ky
ho hoi » hoc hoi, hoa hoi, co hoi
ve cam » ve cac, va cam, ve cai

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 nang ((ho hoi) or (hoi hoi)). hieu ((ve cam) OR (ve cham)) tuc ban thanh de cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky nang ((ho hoi) OR (hoi hoi)). hieu ((ve cam) OR (ve cham)) tuc ban thanh de cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky nang ((ho hoi) or (hoi hoi)). hieu ((ve cam) OR (ve cham)) tuc ban thanh de cua triet*".