Perhaps you should try some spelling variations:
chau tinh » cuu tinh, ha tinh, cua tinh
hanh hang » thanh hang, hang hang, hanh han
dang cong » dung cong
cha tinh » cham tinh, chai tinh, chua tinh
hang cua » mang cua, hang ca, huong cua
cua dang » cua cong, cua ban
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((cha tinh) OR (chau tinh)) - hanh hang cua dang cong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((cha tinh) OR (chau tinh)) - hanh hang cua dang cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((cha tinh) OR (chau tinh)) - hanh hang cua dang cong tac toan cau*.