Perhaps you should try some spelling variations:
hoc chinh » hoan chinh, hoc sinh, hoc kinh
trinh mua » trinh cua, trinh muc, trinh luat
trinh qua » trinh quan, trinh cua, trinh quang
bang cong » dang cong, bang song, hang cong
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cau » phan dau, phan cac, phan tu

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) or (trinh qua)) bang cong san phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chinh sach - hanh ((trinh mua) OR (trinh qua)) bang cong san phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc chinh sach - hanh ((trinh mua) or (trinh qua)) bang cong san phan cau*.