Perhaps you should try some spelling variations:
hien trang » huyen trang, mien trung, bien trong
hanh tranh » canh tranh, hanh trinh, hanh trang
hien sang » khien bang, chieu sang, thien bang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien sang) OR (hien trang)) - hanh tranh cua nhung ((cong dan) or (cong san)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sang) OR (hien trang)) - hanh tranh cua nhung ((cong dan) OR (cong san)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien sang) OR (hien trang)) - hanh tranh cua nhung ((cong dan) or (cong san)) van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sang) OR (hien trang)) - hanh tranh cua nhung ((cong dan) or (cong san)) van ban*.