Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
hoc thuyet » hoc chuyen
cua thuong » cua truong, cua phuong, ca thuong
nganh toan » nganh thanh, thanh toan, manh toan
cua thong » cua khong, cua tong, suat thong
ho chiet » ho chieu, ho thiet, hoc thiet
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 chiet) or (hoc thuyet)) tach - thanh tuong ((cua thong) OR (cua thuong)) trong nganh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (hoc thuyet)) tach - thanh tuong ((cua thong) OR (cua thuong)) trong nganh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) or (hoc thuyet)) tach - thanh tuong ((cua thong) OR (cua thuong)) trong nganh toan tap".
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) or (hoc thuyet)) tach - thanh tuong ((cua thong) OR (cua thuong)) trong nganh toan tap*.