Perhaps you should try some spelling variations:
chinh luan » trinh luan, binh luan
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
hoc chiet » hoc nhiet, hoc hien, hoc viet
hoc thiet » hoc thieu, hoc thuyet, hoc hien
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chiet) OR (hoc thiet)) tach - hanh ((chinh luan) or (chinh ngan)) nhung cong thanh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chiet) OR (hoc thiet)) tach - hanh ((chinh luan) OR (chinh ngan)) nhung cong thanh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chiet) OR (hoc thiet)) tach - hanh ((chinh luan) or (chinh ngan)) nhung cong thanh toan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc chiet) OR (hoc thiet)) tach - hanh ((chinh luan) or (chinh ngan)) nhung cong thanh toan ban*.