Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh 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
toan cao » toan ban, toan tap
doi thi » doi thoi, do thi, doi thu

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

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