Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, thien tinh, lieu tinh
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cong cong » cong dong, dung cong, dang cong
van toan » van tuan, van tan, van thanh
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 ((thieu tinh) or (chieu tinh)) - hanh tranh cua ((cong cong) or (trong cong)) van toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tinh) OR (chieu tinh)) - hanh tranh cua ((cong cong) OR (trong cong)) van toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tinh) or (chieu tinh)) - hanh tranh cua ((cong cong) or (trong cong)) van toan tap*.