Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, danh trung
chieu sang » chieu sach, chieu xanh, nhieu tang
manh trung » manh tung, thanh trung, manh hung
hieu lang » hieu quang, nhieu tang, hieu van
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van 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 ((chieu sang) or (hieu lang)) - ((hanh trung) OR (manh trung)) cua dung cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - ((hanh trung) OR (manh trung)) cua dung cong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (hieu lang)) - ((hanh trung) OR (manh trung)) cua dung cong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu lang)) - ((hanh trung) OR (manh trung)) cua dung cong dan toan ban*.