Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hien xanh » hien hanh, hien nhanh, hien khanh
chinh cua » chinh ca, hinh cua, chinh luan
chinh sua » chinh su, chinh luan, hinh su
dung cong » dung trong
tran chau » tranh chap, tran huu
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren

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