Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
khong dung » thong dung, phuong dung, cuong dung
anh xquang » anh quang, anh quan, anh xuan
doi chieu » doc hieu, doi chi, mot chieu
tuong hoc » truong hoc, tuong ho, duong hoc
xquang ma » quang ma, quang va
tung hoc » trung hoc, dung hoc, tung ho
dung anh » dung danh, duong anh, dong anh

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 xanh - thanh ((tung hoc) or (tuong hoc)) khong dung anh xquang ma~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - thanh ((tung hoc) OR (tuong hoc)) khong dung anh xquang ma.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - thanh ((tung hoc) or (tuong hoc)) khong dung anh xquang ma*.