Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thien » hoc hien, hoc thieu, hoc thiet
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
toan cao » toan ban
toan tap » toan 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 thien thanh - hanh tranh cua ((hang cong) or (bang cong)) van ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien thanh - hanh tranh cua ((hang cong) OR (bang cong)) van ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc thien thanh - hanh tranh cua ((hang cong) or (bang cong)) van ((toan cao) or (toan tap))*.