Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh tranh » canh tranh, hanh trinh, lanh tranh
hanh trang » thanh trung, canh tranh, hanh trinh
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
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: ho chieu tinh - ((hanh tranh) or (hanh trang)) va nhung ((cong dan) OR (cong san)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - ((hanh tranh) OR (hanh trang)) va nhung ((cong dan) OR (cong san)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu tinh - ((hanh tranh) or (hanh trang)) va nhung ((cong dan) OR (cong san)) toan tap".
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - ((hanh tranh) or (hanh trang)) va nhung ((cong dan) OR (cong san)) toan tap*.