Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
trung tuan » trung thanh, trung tam, tran tuan
hieu sang » chieu sang, hieu lang, hieu quang
trong van » trong cac
doc hieu » toc thieu, hoc thieu, hoc hien
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 sang - manh ((trung tuan) or (trong van)) nhung huong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - manh ((trung tuan) OR (trong van)) nhung huong dan than cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - manh ((trung tuan) or (trong van)) nhung huong dan than cau*.