Perhaps you should try some spelling variations:
nphan cong » pham cong, phap cong, phan cung
chieu sang » chieu sach, chieu xanh, hieu lang
doc chieu » doc hieu, doi chieu, toc thieu
phan cong » thanh cong
dan dung » van dung, tin dung, ap dung
dung dan » dung dat, dung san, tung dan
dan van » dang van, doan van, dao 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: doc chieu sang - ((phan cong) or (nphan cong)) dan dung dan van phi dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc chieu sang - ((phan cong) OR (nphan cong)) dan dung dan van phi dau.
• Adding a wildcard symbol may retrieve word variants: doc chieu sang - ((phan cong) or (nphan cong)) dan dung dan van phi dau*.