Perhaps you should try some spelling variations:
trung phung » trong phung, trang phung, trung hung
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
anh xquang » anh quan, anh xuan
phung cong » nhung cong, phong cong, nhung chong
anh quang » anh quan, nhanh quang, tinh quang
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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: doi ((chieu sach) OR (chieu sang)) - ((anh quang) OR (anh xquang)) trung phung cong tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (chieu sang)) - ((anh quang) OR (anh xquang)) trung phung cong tac toan cao~".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu sang)) - ((anh quang) OR (anh xquang)) trung phung cong tac toan cao*.