Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung cap, dung cua
cong tac » cong ty
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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: hoc thieu xanh - hanh ((trung cua) OR (trung tuan)) nhung cong tac ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((trung cua) OR (trung tuan)) nhung cong tac ((toan cau) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trung cua) OR (trung tuan)) nhung cong tac ((toan cau) or (toan ban))*.