Perhaps you should try some spelling variations:
nhung truong » nhung tuong, thuong truong, dung truong
nang truong » tang truong, quang truong, nang luong
thieu sang » chieu sang, thieu khang, thieu quang
thanh tung » thanh cong
thanh toan » thanh hoa, thanh san, tinh toan
hieu lang » chieu sang, hieu quang, nhieu tang
tung cua » trung cua, tuong cua, dung cua
toan tap » toan ban

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 sang) or (hieu lang)) - thanh tung cua ((nhung truong) OR (nang truong)) thanh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (hieu lang)) - thanh tung cua ((nhung truong) OR (nang truong)) thanh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (hieu lang)) - thanh tung cua ((nhung truong) OR (nang truong)) thanh toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (hieu lang)) - thanh tung cua ((nhung truong) OR (nang truong)) thanh toan tap*.