Perhaps you should try some spelling variations:
danh van » doanh van, dang van, dinh van
van vanh » van anh, van hanh, van manh
vanh dai » van dai, vanh tai, lanh dao
ky danh » ky anh, ky dang
van hoi » van hoa, van hoc, van hoe
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
duc van » duc va, duc tan, duc manh
su xac » pu xac, su cac
xac ky » cac ky, sac ky, bac ky

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 danh van hoi. ((hieu ve) or (lieu va)) cac duc van vanh dai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky danh van hoi. ((hieu ve) OR (lieu va)) cac duc van vanh dai cua vat*.