Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
trinh vat » trinh luat, sinh vat, trinh han
trinh van » trinh han, trinh quan, trinh toan
cong san » cong tac
san than » sang than, san thanh, ban than
than cap » khan cap, thanh lap, thanh cac

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: ho ((chieu sang) OR (lieu va)) - hanh ((trinh vat) OR (trinh van)) nhung cong san than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (lieu va)) - hanh ((trinh vat) OR (trinh van)) nhung cong san than cap~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (lieu va)) - hanh ((trinh vat) OR (trinh van)) nhung cong san than cap*.