Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
cong trong » cong thuong, duong trong, cong trinh
hieu lang » chieu sang, hieu quang, hieu van
tong quan » thong quan, tong luan, luong quan
quan cong » qua cong, luan cong, quan dong
trong van » trong cac
anh tong » anh trong, anh thong, anh dong
ban tap » bai tap, han tap, ban tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu lang) or (nhieu tang)) - anh tong quan cong trong van ban tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (nhieu tang)) - anh tong quan cong trong van ban tap*.