Perhaps you should try some spelling variations:
hoang cong » hang cong, hoang long, hoang vuong
cong thanh » dong thanh, cong trinh, cong tan
thanh than » thanh thanh, thanh thang, thanh toan
hoc chinh » hoan chinh, hoc sinh, hoc kinh
tran tuan » tran xuan, tran thanh, tranh luan
than cau » toan cau, phan cau, than cap

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 - thanh ((tran tuan) or (tran quang)) hoang cong thanh than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chinh sach - thanh ((tran tuan) OR (tran quang)) hoang cong thanh than cau.
• Adding a wildcard symbol may retrieve word variants: hoc chinh sach - thanh ((tran tuan) or (tran quang)) hoang cong thanh than cau*.