Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
cuong tap » luong tap, cong tac, luong tai
hoc hieu » hoc thieu, hoc hien, doc hieu
tang cua » mang cua, hang cua, tang luan
cong tap » cong tac, cong tan, tong tap
quan cau » quang cao, toan cau, quan ha

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 ((tang cua) or (tranh cua)) dung ((cong tap) or (cuong tap)) quan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh ((tang cua) OR (tranh cua)) dung ((cong tap) OR (cuong tap)) quan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh ((tang cua) or (tranh cua)) dung ((cong tap) or (cuong tap)) quan cau*.