Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
trang va » tran van, hang va
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
tang va » tang van, thang va, tang vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - hanh ((tang va) or (trang va)) nhung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((tang va) OR (trang va)) nhung cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((tang va) or (trang va)) nhung cong tan toan cau*.