Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh huong
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
thanh tung » thanh cong
cong trong » cong thuong, duong trong, cong trinh
trong bai » trong ban, thong bai, trong hai
bai toan » bai tap
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: theo ((chieu xanh) OR (chieu sang)) - ((thanh truong) or (thanh tung)) cua cong trong bai toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sang)) - ((thanh truong) OR (thanh tung)) cua cong trong bai toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) OR (chieu sang)) - ((thanh truong) or (thanh tung)) cua cong trong bai toan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) OR (chieu sang)) - ((thanh truong) or (thanh tung)) cua cong trong bai toan tap*.