Perhaps you should try some spelling variations:
chinh sua » chinh su, chinh luan, hinh su
chinh cua » chinh ca, hinh cua, chinh luan
dung cong » dung trong
cong tinh » cong trinh, cong vinh, long tinh
chi tach » chiu trach, chiet tach, chi thanh
toan cau » toan cao, toan ban, toan tap
doi chi » doi khi

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi tach - hanh ((chinh sua) OR (chinh cua)) dung cong tinh toan cau~".
• Adding a wildcard symbol may retrieve word variants: doi chi tach - hanh ((chinh sua) OR (chinh cua)) dung cong tinh toan cau*.