Perhaps you should try some spelling variations:
tranh quang » tran quang, trinh quang, tinh quang
quang hoang » quan hoang, tuan hoang, xuan hoang
hoang cong » hang cong, hoang long, hoang vuong
dinh sach » sinh sach, tinh sach, dinh cac
cong san » cong tac
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan 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 ((chinh sach) or (dinh sach)) - canh tranh quang hoang cong san ((than cap) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chinh sach) OR (dinh sach)) - canh tranh quang hoang cong san ((than cap) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: hoc ((chinh sach) or (dinh sach)) - canh tranh quang hoang cong san ((than cap) or (khan cap))*.