Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, thi chieu
tranh van » tran van, trinh van, thanh van
tong cong » trong cong, cong cong, dung cong
ho chieu » theo chieu, hoc thieu, thi chieu
van tong » van thong, van trong, van tuong
cong san » cong tac
pham lan » pham luan, pham van, phan lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((ho chieu) or (mot chieu))) or (doi chieu)) sach - canh tranh van tong cong san pham lan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((ho chieu) OR (mot chieu))) OR (doi chieu)) sach - canh tranh van tong cong san pham lan.
• Adding a wildcard symbol may retrieve word variants: ((((ho chieu) or (mot chieu))) or (doi chieu)) sach - canh tranh van tong cong san pham lan*.