Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
luong quan » thong quan, duong qua
hieu manh » chieu xanh, hieu nganh, dieu hanh
tong quan » thong quan, tong luan, cuong quan
dung cong » dung trong
cong van » cong vang, cong san, song van
van tai » von tai, van tuan
tai cao » thai cao, tao cao, tai sao

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)) - thanh ((tong quan) OR (luong quan)) dung cong van tai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - thanh ((tong quan) OR (luong quan)) dung cong van tai cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (hieu manh)) - thanh ((tong quan) OR (luong quan)) dung cong van tai cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu manh)) - thanh ((tong quan) OR (luong quan)) dung cong van tai cao*.