Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
tieu xanh » tieu danh, chieu xanh, dieu hanh
trinh cua » tinh cua, trinh luat, trinh luan
dang cong » dung cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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 cua) OR (trinh quan)) dang cong dan toan cau~.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh ((trinh cua) or (trinh quan)) dang cong dan toan cau*.