Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
chieu sach » chinh sach, chiet tach, chieu sang
luan trong » quan trong, luat trong, luan tuong
dang luan » dung luan, tang luan, hang luan
anh dang » anh dong, anh dung, anh bang
cong van » cong vang, cong san, song van
van dan » van ban, ban dan, van dao
dan thi » dang thi, tran thi, dinh thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((thieu xanh) or (chieu sach)) - anh dang luan trong cong van dan thi~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu xanh) OR (chieu sach)) - anh dang luan trong cong van dan thi*.