Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chua xang » chua nang, chuc nang, chu bang
trinh san » trinh han, trinh quan, trinh toan
chu xanh » chu manh, chieu xanh, chuc danh
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
toan ban » van ban
san va » san van, ban va, dan va

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: theo ((chu xanh) OR (chua xang)) - trinh san va nhung cong dan ((toan cao) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) OR (chua xang)) - trinh san va nhung cong dan ((toan cao) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) OR (chua xang)) - trinh san va nhung cong dan ((toan cao) or (toan ban))*.