Perhaps you should try some spelling variations:
hien manh » hien hanh, tien manh, hieu manh
doanh cua » doanh luan
trinh han » trinh quan
dung cong » dung trong
tinh cua » trinh cua, sinh cua, tinh chat
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tan, tran tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien manh - hanh ((((tinh cua) or (doanh cua))) or (trinh han)) dung cong tan tran tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien manh - hanh ((((tinh cua) OR (doanh cua))) OR (trinh han)) dung cong tan tran tap.
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - hanh ((((tinh cua) or (doanh cua))) or (trinh han)) dung cong tan tran tap*.