Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
dang cong » dung cong
van thang » van thanh, van khang, van hang
thang cao » thong cao, thang lao, nang cao
tung van » trung van, dung van, tong van
tang van » dang van, hoang van, trong van
cong van » cong vang, cong san, song van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (chieu sach)) - thanh ((tung van) OR (tang van)) dang cong van thang cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sach)) - thanh ((tung van) OR (tang van)) dang cong van thang cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sach)) - thanh ((tung van) OR (tang van)) dang cong van thang cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sach)) - thanh ((tung van) OR (tang van)) dang cong van thang cao*.