Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
nang cong » nang song, dang cong, bang cong
cong tan » cong tac, cong san, cong thanh
toan ban » van ban
tang va » trang va, tang van, thang va
va nang » van nang, da nang, cam nang

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 tang va nang cong tan ((toan tap) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh tang va nang cong tan ((toan tap) or (toan ban))*.