Perhaps you should try some spelling variations:
hanh trinh » canh tranh
tieu xanh » tieu danh, chieu xanh, dieu hanh
nhan dang » nhan dan, phan dang, tran dang
chua dong » cua dong, ha dong, huy dong
dong cong » duong cong, dung cong, dang cong
cong anh » cong danh, dong anh, hong anh
anh van » anh va, thanh van, doanh 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: theo tieu xanh - ((((hanh trinh) OR (hanh chinh))) OR (nhan dang)) chua dong cong anh van thu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - ((((hanh trinh) OR (hanh chinh))) or (nhan dang)) chua dong cong anh van thu~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - ((((hanh trinh) OR (hanh chinh))) or (nhan dang)) chua dong cong anh van thu*.