Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
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, trung cap
cua nhung » va nhung
cong tan » cong tac, cong san, cong thanh
tan ca » tan cua, tang ca, dan ca
ca cau » cua cau, cac cau, can cau

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

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