Perhaps you should try some spelling variations:
thong duong » tuong duong, thong dung, thong huong
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
doanh luan » doanh nhan
duong tinh » duong minh, duong sinh, dong tinh
toan cao » toan ban, toan tap

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 (chieu xanh)) - hanh ((doanh cua) OR (doanh luan)) thong duong tinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - hanh ((doanh cua) OR (doanh luan)) thong duong tinh toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu xanh)) - hanh ((doanh cua) OR (doanh luan)) thong duong tinh toan cao*".