Perhaps you should try some spelling variations:
tran manh » tran minh, tran thanh, tran van
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
hieu vo » hieu voi, hieu va, hieu ve
va hanh » va thanh, va danh, ban hanh
vu cac » va cac, tu cac, ve cac
nang o » nang co, nang ho, nang ro
co duc » co duoc, cao duc, do duc
di cua » dai cua, doi cua, de cua
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu cac ky nang o hoi. hieu vo co duc ((va hanh) or (((van hanh) or (tran manh)))) di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu cac ky nang o hoi. hieu vo co duc ((va hanh) OR (((van hanh) OR (tran manh)))) di cua viet.
• Adding a wildcard symbol may retrieve word variants: vu cac ky nang o hoi. hieu vo co duc ((va hanh) or (((van hanh) or (tran manh)))) di cua viet*.