Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
cua thuong » cua truong, ca thuong, cua huong
cua phuong » cuu phuong, cuc phuong, luan phuong
hoc nhiet » hoc thiet, hoc nghien, hoc viet
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

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 nhiet) OR (hoc hien)) tach - hanh trinh ((cua thuong) OR (cua phuong)) cong tac toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc nhiet) or (hoc hien)) tach - hanh trinh ((cua thuong) OR (cua phuong)) cong tac toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((hoc nhiet) or (hoc hien)) tach - hanh trinh ((cua thuong) OR (cua phuong)) cong tac toan ban*.