Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
dung luong » dung thuong, dung phuong, dung truong
hieu manh » chieu xanh, hieu nganh, dieu hanh
doanh cua » doanh luan
luong tai » dung tai, luong va
manh cua » ban cua
tai toan » bai toan, tap toan, tai tuan
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 ((thieu xanh) OR (hieu manh)) - hanh ((manh cua) or (doanh cua)) dung luong tai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - hanh ((manh cua) OR (doanh cua)) dung luong tai toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - hanh ((manh cua) or (doanh cua)) dung luong tai toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - hanh ((manh cua) or (doanh cua)) dung luong tai toan cau*.