Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
truong va » truong dai, truong cao, truong dao
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
tac toan » tap toan, tam toan, hach toan
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: ho ((hieu lang) OR (chieu sang)) - thanh truong va ((hang cong) or (bang cong)) tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sang)) - thanh truong va ((hang cong) OR (bang cong)) tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (chieu sang)) - thanh truong va ((hang cong) or (bang cong)) tac toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (chieu sang)) - thanh truong va ((hang cong) or (bang cong)) tac toan tap*.