Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tieu xanh » chieu xanh, dieu hanh, tien anh
tieu danh » dieu danh, tiep danh, thien danh
trang va » tran van
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu xanh) OR (tieu danh)) - hanh ((hang va) OR (trang va)) nhung cong tan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu xanh) OR (tieu danh)) - hanh ((hang va) or (trang va)) nhung cong tan toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu xanh) OR (tieu danh)) - hanh ((hang va) or (trang va)) nhung cong tan toan cau*.