Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
thang cua » thong cua, hang cua, than cua
trung cua » truong cua, trung tuan, trung cap
cong cong » cong dong, trong cong, dung cong
cong san » cong tac
san can » san van, ban can, san chang
can ban » van ban, toan 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 ((hieu manh) OR (chieu xanh)) - hanh ((thang cua) or (trung cua)) cong cong san can ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - hanh ((thang cua) OR (trung cua)) cong cong san can ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (chieu xanh)) - hanh ((thang cua) or (trung cua)) cong cong san can ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (chieu xanh)) - hanh ((thang cua) or (trung cua)) cong cong san can ban*.