Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, hieu van
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
san thanh » ban thanh, van thanh, son thanh
thanh cau » thanh chau, thanh mau, nhanh cau
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu lang) or (nhieu tang)) - hanh ((trung cua) OR (trung cap)) nhung cong san thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu lang) OR (nhieu tang)) - hanh ((trung cua) OR (trung cap)) nhung cong san thanh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu lang) or (nhieu tang)) - hanh ((trung cua) OR (trung cap)) nhung cong san thanh cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu lang) or (nhieu tang)) - hanh ((trung cua) OR (trung cap)) nhung cong san thanh cau*.