Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
cong manh » cong danh, duong manh, cong thanh
tranh va » tranh van, trang va, trinh va
toan cau » toan ban, toan tap, toan tai
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: ((doi chieu) or (theo chieu)) xanh - hanh tranh va nhung cong manh ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo chieu)) xanh - hanh tranh va nhung cong manh ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (theo chieu)) xanh - hanh tranh va nhung cong manh ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo chieu)) xanh - hanh tranh va nhung cong manh ((toan cau) OR (toan cao))*.