Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thien danh » thien anh, thien dang, thien thanh
nang luong » nang song
luong bac » luong cac, phuong bac, luong va
van nang » van quang, van ban, van dong
bac than » bac thanh, bac thang, ban than
than cau » toan cau, phan cau, than cap
pho van » ho van, phi van, tho van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (thien danh)) - thanh pho van nang luong bac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien danh)) - thanh pho van nang luong bac than cau*.