Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
trang cua » tang cua, trung cua, thang cua
tranh cua » doanh cua, manh cua
dang cong » dung cong
cong tac » cong ty
tac van » tac vang, cac van, tac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (chieu xanh)) - hanh ((trang cua) or (tranh cua)) dang cong tac van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - hanh ((trang cua) OR (tranh cua)) dang cong tac van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - hanh ((trang cua) or (tranh cua)) dang cong tac van ban*.