Perhaps you should try some spelling variations:
chieu manh » chieu xanh, chu manh, chieu sach
hieu manh » chieu xanh, hieu nganh, dieu hanh
manh tran » manh toan, manh tuan, canh tranh
dang cong » dung cong
cong bang » cuong bang, dong bang, hong bang
bang nhan » ban nhan, hoang nhan, bang thanh
tran tan » tran tuan, tran van, tran thanh
tan dang » tran dang, tuan dang, tan dung
nhan ha » nhanh ha, nhan hoa, nhan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu manh) or (chieu manh)) - manh tran tan dang cong bang nhan ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (chieu manh)) - manh tran tan dang cong bang nhan ha*.