Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
manh toan » thanh toan, anh tuan, tinh toan
xuan dang » xuan cang, tuan dang, xuan dan
xuan nang » luan nang, xuan hoang, van nang
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, than cap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - manh toan ((xuan dang) OR (xuan nang)) cong dan ((than cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - manh toan ((xuan dang) OR (xuan nang)) cong dan ((than cau) OR (phan tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - manh toan ((xuan dang) OR (xuan nang)) cong dan ((than cau) or (phan tu))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - manh toan ((xuan dang) OR (xuan nang)) cong dan ((than cau) or (phan tu))*.