Perhaps you should try some spelling variations:
thanh dong » thanh duong, thanh cong, hanh dong
quang dung » quang trung, ung dung, cuong dung
doi chieu » doc hieu, doi chi, mot chieu
dat quang » dau quang, chat quang, dang quang
dong dat » dong vat, dung dat, dong ha
van dau » van dao, phan dau
luan » quan, lan

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