Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
doi chiu » doi chieu, hoi chiu, doi chinh
tang cua » mang cua, hang cua, tang luan
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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 chiu) OR (doi chi)) trach - hanh tang cua nhung cong tac toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((doi chiu) OR (doi chi)) trach - hanh tang cua nhung cong tac toan cau*.