Perhaps you should try some spelling variations:
trang luan » tang luan, trang tuan, truong luan
tranh luan » trinh luan, trinh luat, doanh luan
nhung cong » dung cong, thong cong, hang cong
chi thanh » chi nhanh, thi thanh, cho thanh
cong tinh » cong trinh, cong vinh, long tinh
chi hanh » chi nhanh, thi hanh, chi anh
toan cao » toan ban, toan tap

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

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