Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang
nhiet nang » nhiet dong, viet nang, thien nang
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
trung cua » truong cua, trung cap, dung cua
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
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: hoc ((nhieu tang) OR (nhiet nang)) - hanh ((trung cua) or (trung tuan)) nhung cong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((nhieu tang) OR (nhiet nang)) - hanh ((trung cua) OR (trung tuan)) nhung cong van toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((nhieu tang) OR (nhiet nang)) - hanh ((trung cua) or (trung tuan)) nhung cong van toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((nhieu tang) OR (nhiet nang)) - hanh ((trung cua) or (trung tuan)) nhung cong van toan cau*.