Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
luan hang » luan nang, luan hung, luan tang
luan han » luan hoan, luan phan, luan van
cong tac » cong ty
than ban » thanh ban, toan ban, nhuan ban
than man » than ma, thanh san, tran manh

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 ((luan hang) OR (luan han)) cong tac ((than ban) OR (than man))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh tang ((luan hang) or (luan han)) cong tac ((than ban) OR (than man))~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh tang ((luan hang) or (luan han)) cong tac ((than ban) OR (than man))*.