Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
thang cua » thong cua, than cua, thang mua
hoc hieu » hoc thieu, hoc hien, doc hieu
tang cua » mang cua, tang luan, thong cua
hang cua » mang cua, hang ca, huong cua
cong san » cong tac
san toan » van toan, dan toan, manh toan
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: hoc hieu manh - hanh ((thang cua) or (((tang cua) OR (hang cua)))) nhung cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh ((thang cua) OR (((tang cua) OR (hang cua)))) nhung cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - hanh ((thang cua) or (((tang cua) OR (hang cua)))) nhung cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh ((thang cua) or (((tang cua) OR (hang cua)))) nhung cong san toan cau*.