Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
nhieu tang » chieu sang, hieu lang, nhiet nang
thanh chau » thanh cha, thanh cham, thanh chu
hanh tran » hanh trang, thanh tran, hanh tram
dong cong » duong cong, dung cong, dang cong
tran van » luan van
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu quang) or (nhieu tang)) - hanh tran van dong cong dan ((thanh chau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (nhieu tang)) - hanh tran van dong cong dan ((thanh chau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) or (nhieu tang)) - hanh tran van dong cong dan ((thanh chau) or (toan cau))*.