Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hoc chinh » hoan chinh, hoc sinh, hoc kinh
trinh mua » trinh cua, trinh muc, trinh qua
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
san than » sang than, san thanh, ban than
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 - hanh trinh mua ((hang cong) or (bang cong)) san than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chinh sach - hanh trinh mua ((hang cong) OR (bang cong)) san than cau.
• Adding a wildcard symbol may retrieve word variants: hoc chinh sach - hanh trinh mua ((hang cong) or (bang cong)) san than cau*.