Perhaps you should try some spelling variations:
cong thuat » trong thuat, vuong thuat, cong thuc
thuat nang » thuat bang, thuat mang, thuat trang
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
nang cong » nang song, dang cong, bang cong
cong tran » cong tan, cong tuan, cong toan
tran van » luan van

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu manh)) - thanh cong thuat nang cong tran van ban~.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hieu manh)) - thanh cong thuat nang cong tran van ban*.