Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tranh » canh tranh, hanh trinh, hanh trang
cong thanh » dong thanh, cong trinh, cong tan
ho chieu » theo chieu, hoc thieu, doi chieu
theo chu » theo chieu, cho chu, chao chu
tranh va » tranh van, trang va, trinh va
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap

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 (theo chu)) sach - hanh tranh va nhung cong thanh ((than cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chu)) sach - hanh tranh va nhung cong thanh ((than cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chu)) sach - hanh tranh va nhung cong thanh ((than cau) or (toan cau))*.