Perhaps you should try some spelling variations:
trung thuat » trong thuat, thuong thuat, trung tuan
thanh trung » thanh tung
thuat nhung » thuat hung, thuat chung, thuat chuong
nhung cong » dung cong, thong cong, hang cong
hoc chiet » hoc nhiet, hoc hien, hoc viet
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cong manh » cong danh, duong manh, cong thanh
toan ban » van ban
toan cao » toan tap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chiet) OR (hoc thiet)) tach - thanh trung thuat nhung cong manh ((toan ban) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chiet) OR (hoc thiet)) tach - thanh trung thuat nhung cong manh ((toan ban) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: ((hoc chiet) OR (hoc thiet)) tach - thanh trung thuat nhung cong manh ((toan ban) or (toan cao))*.