Perhaps you should try some spelling variations:
thanh tung » thanh cong
quang dong » quang dung, quan dong, quang cuong
doi chieu » doc hieu, doi chi, mot chieu
dat quang » dau quang, chat quang, dang quang
dong luan » dung luan, tong luan, dong xuan
luan phan » luan van, luan hoan
tung dat » dung dat, vung dat, tung dan

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) or (toc thieu)) tinh - thanh tung dat quang dong luan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) tinh - thanh tung dat quang dong luan phan tu.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) tinh - thanh tung dat quang dong luan phan tu*.