Perhaps you should try some spelling variations:
thanh tung » thanh cong
quang dung » quang trung, ung dung, cuong dung
cao quang » cao quan, cai quang, dao quang
ho chieu » theo chieu, hoc thieu, mot chieu
tung cao » nung cao, truong cao, trung cap
van bac » van ban, van bao, van hac
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: ((ho chieu) or (toc thieu)) tinh - thanh tung cao quang dung luan van bac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (toc thieu)) tinh - thanh tung cao quang dung luan van bac.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (toc thieu)) tinh - thanh tung cao quang dung luan van bac*.