Perhaps you should try some spelling variations:
tung quang » tuong quang, dung quang, hung quang
toc chieu » toc thieu, doc hieu, mot chieu
hoc thieu » toc thieu, hoc hien
dung quan » dung quang, dung luan, luong quan
dung dat » dung va, dung tai
dat van » dao van, dat va, dam van
van dau » van dao, phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc chieu) or (hoc thieu)) sach - thanh ((tung quang) or (dung quan)) ung dung dat van dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc chieu) OR (hoc thieu)) sach - thanh ((tung quang) OR (dung quan)) ung dung dat van dau.
• Adding a wildcard symbol may retrieve word variants: ((toc chieu) or (hoc thieu)) sach - thanh ((tung quang) or (dung quan)) ung dung dat van dau*.