Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien sang » hien trang, khien bang, chieu sang
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sang - hanh trinh cua ((hang cong) OR (dang cong)) ban ((phan cau) OR (phan cac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien sang - hanh trinh cua ((hang cong) or (dang cong)) ban ((phan cau) OR (phan cac))~".
• Adding a wildcard symbol may retrieve word variants: hoc hien sang - hanh trinh cua ((hang cong) or (dang cong)) ban ((phan cau) OR (phan cac))*.