Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
dang cong » dung cong
tien anh » tieng anh, tien manh, dien anh
cua dang » cua cong, cua ban
tan toan » tap toan, van toan, dan toan

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

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