Perhaps you should try some spelling variations:
nphan cong » pham cong, phap cong, phan cung
chieu sang » chieu sach, chieu xanh, hieu lang
chi chieu » chi hieu, thi chieu, thi chien
phan cong » thanh cong
dan dung » van dung, tin dung, ap dung
dung dat » dung va, dung tai
dat van » dao van, dat va, dam van
van phi » van chi, van phu, van nhi
phi dau » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: chi chieu sang - ((phan cong) or (nphan cong)) dan dung dat van phi dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chi chieu sang - ((phan cong) OR (nphan cong)) dan dung dat van phi dau.
• Adding a wildcard symbol may retrieve word variants: chi chieu sang - ((phan cong) or (nphan cong)) dan dung dat van phi dau*.