Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
mang cua » manh cua, dung cua, cong cua
toan cau » toan cao, toan ban, toan tap
ban cua » ban quan
ty toan » ly toan, tap toan, huy toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - hanh ((((mang cua) OR (ban cua))) or (dung luan)) nhung cong ty toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - hanh ((((mang cua) OR (ban cua))) OR (dung luan)) nhung cong ty toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - hanh ((((mang cua) OR (ban cua))) or (dung luan)) nhung cong ty toan cau".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh ((((mang cua) OR (ban cua))) or (dung luan)) nhung cong ty toan cau*.