Perhaps you should try some spelling variations:
tran phuong » tran phong, trinh phuong, doan phuong
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, mot chieu
anh quang » anh xquang, nhanh quang, tinh quang
cuong tap » cong tac, luong tai, cong tan
luong tap » luong tai, luong tham, luong thai
anh quan » anh tuan, ban quan, anh nhan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - ((anh quang) or (anh quan)) tran phuong ((cuong tap) or (luong tap)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((anh quang) OR (anh quan)) tran phuong ((cuong tap) OR (luong tap)) toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((anh quang) or (anh quan)) tran phuong ((cuong tap) or (luong tap)) toan cau*.