Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
va phuong » va thuong, cac phuong
doc hieu » toc thieu, hoc hien
va thong » va thuong, he thong, va 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: ((doc hieu) or (hoc thieu)) sach - canh tranh ((va thong) or (va phuong)) cong san phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) sach - canh tranh ((va thong) OR (va phuong)) cong san phan cau.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc thieu)) sach - canh tranh ((va thong) or (va phuong)) cong san phan cau*.