Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, hien khanh
tranh cua » manh cua
doanh cua » doanh luan
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than ban » thanh ban, toan ban, than man

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