Perhaps you should try some spelling variations:
dong cong » duong cong, dung cong, dang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
vang toan » van toan, dang toan, quang toan
dang tran » dang thanh, quang tran, hoang tran
hoc hieu » hoc thieu, hoc hien, doc hieu
anh nang » ganh nang, anh bang, anh dang
nang cua » mang cua, hang cua, nang dua
cua dong » chua dong, cua cong, cua dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - anh nang cua dong cong ((vang toan) or (dang tran)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - anh nang cua dong cong ((vang toan) OR (dang tran)) cao*.