Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong dan » cong san, cong tan, cong dong
than ban » thanh ban, toan ban, than man

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

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