Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
cong dang » cong dong, cong dan, cong dung
trinh vi » trinh va, trinh viet, trinh van
trinh ve » trinh he, trinh va, trinh viet
thi cao » thai cao, thi bao, thi cam
thi hao » thi thao, thi hai, thi ha

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - canh ((trinh vi) OR (trinh ve)) nhung cong dang ((thi cao) OR (thi hao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - canh ((trinh vi) or (trinh ve)) nhung cong dang ((thi cao) OR (thi hao))~".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh ((trinh vi) or (trinh ve)) nhung cong dang ((thi cao) OR (thi hao))*.