Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, hieu quan
trien quang » tran quang, tuyen quang, dien quang
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
cac cau » cac mau, bac cau, cac cam
ca cau » cua cau, can cau, ca cac

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

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