Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
chinh suat » chinh sua, chinh luan, chinh phat
hien xanh » hien hanh, hien nhanh, chieu xanh
dung cong » dung trong
trai chau » tran chau, trai chan, lai chau
chinh su » hinh su, chinh phu, chinh ta
cong tam » cong tac, cong tan, cong nam
tam trai » tam tri, tac trai, kham trai

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