Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
hieu xanh » chieu xanh, hieu manh, hieu nganh
trang cua » tranh cua, tang cua, thang cua
trung cua » truong cua, trung tuan, trung cap
doc hieu » toc thieu, hoc thieu, hoc hien
cong san » cong tac
toan 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: doc hieu xanh - hanh ((trang cua) OR (trung cua)) trong ((cong thanh) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh ((trang cua) OR (trung cua)) trong ((cong thanh) OR (cong san)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh ((trang cua) OR (trung cua)) trong ((cong thanh) or (cong san)) toan ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh ((trang cua) OR (trung cua)) trong ((cong thanh) or (cong san)) toan ban*.