Perhaps you should try some spelling variations:
dong luong » cong luong, dong duong, dong huong
doanh cua » doanh luan
luong tai » dung tai, luong va
ho chieu » theo chieu, hoc thieu, doi chieu
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: ((ho chieu) or (hoc hien)) xanh - hanh ((manh cua) or (doanh cua)) dong luong tai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc hien)) xanh - hanh ((manh cua) OR (doanh cua)) dong luong tai toan cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc hien)) xanh - hanh ((manh cua) or (doanh cua)) dong luong tai toan cau*.