Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
trung cua » truong cua, trung tuan, trung cap
tran chau » tranh chap, tran huu
cong tac » cong ty
tran cau » toan cau, ran cau, tra cau

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 ((tranh cua) or (trung cua)) nhung cong tac ((tran cau) OR (tran chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((tranh cua) OR (trung cua)) nhung cong tac ((tran cau) OR (tran chau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh ((tranh cua) or (trung cua)) nhung cong tac ((tran cau) OR (tran chau))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((tranh cua) or (trung cua)) nhung cong tac ((tran cau) OR (tran chau))*.