Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
khac ty » khac thi
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
vu khac » vu kham, vu khanh, bui khac
hieu ve » hieu van
ty nang » ky nang, ty xang, ty hang
o hoi » co hoi, o hoc, o hai
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khac ty nang ((o hoi) or (x ho)). ((hieu ve) or (hieu va)) cam duc van hanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khac ty nang ((o hoi) OR (x ho)). ((hieu ve) OR (hieu va)) cam duc van hanh vi su triet.
• Adding a wildcard symbol may retrieve word variants: vu khac ty nang ((o hoi) or (x ho)). ((hieu ve) or (hieu va)) cam duc van hanh vi su triet*.