Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trung cua » truong cua, trung tuan, trung cap
tang luan » dung luan
chu tinh » chau tinh, chua tinh, cuu tinh
tang cua » mang cua, hang cua, thong cua
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
ho chu » hoi chu, cho chu, ho chua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chu tinh - hanh ((trung cua) or (((tang cua) OR (tang luan)))) nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chu tinh - hanh ((trung cua) OR (((tang cua) OR (tang luan)))) nhung cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chu tinh - hanh ((trung cua) or (((tang cua) OR (tang luan)))) nhung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chu tinh - hanh ((trung cua) or (((tang cua) OR (tang luan)))) nhung cong tac toan cau*.