Perhaps you should try some spelling variations:
trung tuan » trung thanh, tran tuan, truong thanh
dang cong » dung cong
chi xanh » chi anh, chi hanh, chieu xanh
chi danh » chi dan, chi anh, chi dinh
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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: doi ((chi xanh) or (chi danh)) - manh ((trung tuan) OR (trung tam)) dang cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi xanh) OR (chi danh)) - manh ((trung tuan) OR (trung tam)) dang cong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi xanh) or (chi danh)) - manh ((trung tuan) OR (trung tam)) dang cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: doi ((chi xanh) or (chi danh)) - manh ((trung tuan) OR (trung tam)) dang cong tan toan cao*.