Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
trang cua » tranh cua, tang cua, thang cua
trung cua » truong cua, trung tuan, trung cap
cong tan » cong tac, cong san, cong thanh
toan ban » van ban
can ban » van ban

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